I digged out some Information about the 64 Staghounds (UNIT 39) the Swiss Military bought in 1951.
They were never armed or operational.
Except ONE with a 4.7cm AT-Gun and two MG at 1954, ONE with a 9cm immitation gun and and three more running withouth any equipement.
The rest basicly disapreard... some turrets were later used as bunker and others as hard Targets for Training.
The source how ever is only in German - though relaiable - the army Museum in Thun.
http://www.armeemuseum.ch/fileadmin/...SAM_d_3-13.pdf
Suggestion:
Option 1 Leave them in; but Change the main gun to 47mm PzAbwK and remove the AAMG - avaiable from about 1954 - mid 90s
Option 2 remove them from the SWISS oob (my favourite)