That's very interesting, given that there do not appear to be any known photographs of the M1990 static version (
http://blog.daum.net/rodin/15963532)
.lbm 45500 is used for both this and the Greek Artemis system; I have attached the original of the lbm - it is an Artemis.
I will repeat this - these are anomalies, and without seeing a photo of the real thing, nobody can really make a judgment 'against the head', as they say in rugby.
Richard H