Just while browsing for examples I came across some saying the glass was flashed and others stained... though most did not mention it .... scouring sources I can find nothing to indicate if Moser were flashing or staining. One even mentioned pseudo cameo for 8174 type... did not buy that.
Also saw quite a few examples on-line with a deep blue, presumably a later colour as all those shown in the catalogue are quite light colours. I also have their 1948 catalogue (already on-line) but that has none of these early styles, and another from 1950s which I cannot find... grrr.