Explanation of the of this phenomen why 7TP has too weak armour need a comprasion with another tanks from the Vickers 6-Ton (Mk.E) family like rusian T-26 and vickers tanks in another cauntrys service and as I saw we have a mess with this.
First I think a best page with story of Vickers 6-Ton
http://derela.republika.pl/vae.htm
First lets see in polish OOB
unit 449 that is Vickers E Mk.A buy in GB by polish Goverment. That is a orginal british version only a HMG are polish wz.25 So how looks this tanks has 3 people crew , can carry 6 soliders on armour , his weight is 10, speed 12 because 35km/h:3 give 11,6666... so speed is round up . Radio only 22 because has no radio. FC=1 and RF=1 Survability=3 like for this tanks class and the moust important thing the armour hull: front and sides - 13mm, rear - 8mm ,turret (both single-turret and twin-turret)13mm all around top and bottom - 5mm so is HF=2 , HS=2 , HR=1 , TF=2 , TS=2 , TR=1 , Top=1 So I have a proposition change TR =2 because turent has armour all the same. ROF for MG version is 9. I thing this parameters should good describe a standard UK made Vickers tank with two turents.
Unit 450 that is Vickers E Mk.B typical tank from GB with 47mm Vickers gun and here with polish wz.30 CMG insted of 7.7mm vickers CMG. All parameters are like previous version except FC=2 single turent version has a optic sight and armour should be hanged TR=2 like in previous unit. ROF=8 because gun is not so fast like TMG in two turents version and icon is of course with single turent. lbm is not good because represents leter polish rebuild variant with air inlets but here is not rebuild version so should be lbm 27614
Unit 638 is for remove because represents this same units what 449 is a clone
Unit 639 Represent Mk.A with polish only rebuild air intakes , camo from years 34-36. This version has in one of the turents 13.2mm TMG The lbm what should be good for this version is PM30225-old.LBM you can see on this photo a longer TMG in one turent. In armour HR is 2 for all polish tanks with rebuild air intakes. TR shuld be changed TR=2. Radio code is 21 because not many of tanks was rebuild for this standart.
Unit 640
The same rebuild what previous unit but with old 37mm SA18 puteaux gun TR should be 2. Radio code too with 21 because not many rebuild
Unit 641
Standart version with two wz.25 TMG .TR should be changed
TR=2 like in previous tanks here I propositioned a new lbm Pm29427.lbm because previous photo represents tank without air intakes Icon too ned changes to for old camo version summer and desert icon should be 3472 for winter 3473
Unit 642
too standart version but after rearm to wz.30 TMG. in armour too change for TR=2 is need and lbm I propositioned Pm29428.lbm represents tank with air intakes and wz.30 TMG. As you can see in this last configuration was used by polish in 1939
Unit 643
Is not need should be removed this unit is a clone of unit 450
Unit 644
Vickers one turent in old camo and with air intake so HR is 2. In this tank TR should be changed to 2 because turent with gun was 13mm all around like in two turent version
Unit 645
The same tank like previous but with new camo TR should be 2
Unit 646
the same what previous TR should be 2 but after euiped all vickers single turent tanks in radio so Radio is 82
Rusian OOB
Rusian buy this Vickers tanks and than made his own T-26.
Unit 518 represents this orginal UK made tanks. speed should be changed to 12 not 10 like is today. DT TMG are good rusian arms this tanks in his own TMGs. TR should be 2 like changes in polish oob. Icon is from T-26 M1931 what is very similar I proposition put here a new Vickers icons what are in atachment. I propositioned too change a lbm to 27617 because this today represents vickers tank in polish camo.
Chinse comunists OOB
Unit 005 as I supppouse is a Vickers Vickers E Mk.B single turent variant. What should be changed: Crew should be 3 , Speed 12 , Radio should be 8X because chinse tanks was radio equiped , gun weapon 019 I think is not good compare with weapon 023 in polish oob ammo for gun should be HE=25 and AP=24 tank has 49 shells. In slot two should be Vickers CMG , Vickers BMG should be removed in slot 4. FC should be changed to 2. In Armour HF changed to 2 , HR=1 , TF=2. Icon is from vickers 12-ton tank I propositioned put here a special icon for chinse vickers tanks with radio roof in turent rear icon 3481. LBMs for chinse Vickers E one turents are 27612 and 27613
Unit 288
No info about buy to china a two turent variant of Vickers tank so meyby should be removed? but if you want leve here this tank need changes. Crew:3 , Speed:12 , TR=2 , ROF=9 Icon is taken from T-26 M1931 I propositioned put here a new vickers icons. Propositioned lbm 27617
Bulgarian OOB
Unit 001
change speed:12 , FC=2 , RF=1 , Gun to weapon like 023 in polish OOB , AP ammo should be 24 , TR armour should be 2 as a icon I propositioned new vickers icons in fabric camo 3480.
Unit 282
Need the same changes like unit 001
Nationalist China OOB
Unit 005
need the same changes like unit 005 in Comunists china OOB
Unit 288
need the same changes like unit 288 in Comunists china OOB
In 1935 china buy 23 Dragon, Medium Mk.IV based on vickers E
Netherlands OOB
Unit 309
gun I thing need comprasion see weapon 023 in polish OOB in netherlads parameters are difrents ammo changes HE=25 AP=24 Saboot =0. Another changes FC=2 , HF=2 , HR=1 , TF=2. Icon can be changed to one of new icons in atachment
Greece OOB
Unit 365
Crew=3 , Speed=12 , TR=2 icon can be changed from T-26 M1931 to one of the new Vickers E Mk.A icons
Unit 366
lbm should be changed because represents polish variant with air intakes I propositioned 27611 or 27614. Speed=12 , FC=2 , HF=2 , HR=1 , TF=2. Gun should be compared to weapon 023 in polish OOB ammo AP=24 , Sabot=0. Icon can be changed to one of the new vickers icons
Finland OOB
Finlan buy in 1933 one single turent variant for test with 47mm orginal gun. Than in years 1938-1939 buy 33 tanks some with Mark E hull the last with Mark F hull. Tanks were without guns so Finns buy in bofors fabric 37mm guns the same what were used in polish 7TP tanks. In the first period tanks were unarmed or armet with one TMG or 37mm puteaux makeschift. Than were armed in 37mm gun but with makeshift sights because germans don't sell optics for gun.
Unit 004
Schould be Crew=3 , Radio meaby 20? , Ammo for gun HE=25 AP=50 Sabot=5 like in 7TP see to the weapon 14 shuld have the same parameters like weapon 015 in Polish OOB. Wapon in slot 2 should be Maxim CMG. RF=1 armour HS=2 , TS=2 , TR=2 I proposition add a new icon of this tank made specialy for finish Vickers.
I proposition too add a new units what represents a late vickers tanks with Mark.F hull all parameters should be the same like unit 004 after modification but HR=2 because F version hull has difrent (better) shape of hull and icons from scope 3483-3486. Next new unit what can be add for finish OOB is T-26E this is a Vickers E with 45mm gun weapon 018 and DT CMG demounted from destroyed T-26 with optic FC=1 RF=1. LBM 23556 represents this tank.
Siam (Thailand) OOB
Unit 010
Carry=6 , Speed=12 , FC=2 , Gun wepon 204 should be compared to weapon 023 in polish OOB ammo HE=25 AP=24 Sabot=0 Armour HF=2 , HR=1 , TF=2 icon can be take from new vickers icon in atachment
Unit 020
AA SP-vehicle based on Vickers E should have lbm 9008 this today is wrong speed=12 weapon should be 019 2-pdr AA gun and armour HF=2 Icon for this vehicle should be 3482.
Unit 019
That is not a vickers E based vehicle but is mis-mach with unit 020 shuld have lbm 17025 weapon 007 insted of pom-pom
Unit 370
Need this changes what was made in unit 010 icon 3480 should be good
I propositioned in unit 370 change start date to 1939 so this unit can represents secound series of tanks with Mark.F hull if this change be made HR should be 2 and nd icons from scope 3483-3486 should be used
Blue OOB
Unit 001
Crew=3 Speed=12 Radio=22 , TR=2 Icon can be used some of the new for Vickers E vehicles insted of this from T-26. One of bolivian Mk.A were captured together with singl turent version were sold by Paraquay goverment to republican spain in 1937.
Unit 002
Crew=3 Speed=12 Radio=22 Ammo AP=24 ,FC=2 , TR=2 , icon 3480 , lbm 27611 should be good because this tank has no air intakes. Year I proposited to change start year to 1933
because in this year Bolivia aquired from vickers fabric single turent Vickers E and use them in Gran-Chaco war with Paraquay and captured by enemy in december 1933. From Paraquay tank were sold to republican spain in January 1937
British OOB
Britain has four of this tanks in takes by goverment after WWII starts that was last from the series for Thailand with Mark.F hull I propositioned put this tank for home guard vehicles or experimental vehicles.
I propositioned too add a Dragon, Medium Mk.IV artilery tractor Vickers build 12 vehicles for british army
I thing that was a vehicle like unit 020 AA vehicle in Thailand OOB but without pom-pom gun and turent armour icon for this vehicle is 3447. All vehicles were in BEF and were destroyed in Dunquierque in 1940 were used for towed 60-pdr guns (127 mm)
India OOB
In 1937 India bought 18 Dragon, Medium Mk.IV