This is another unusual feature, for no apparent specific reason. All pistols also have a sturdy lanyard loop integral with the frame. The only visible variations I have seen are in grips, which could be wood, wood with medallions or checkered plastic with the Star logo. 32 was more common for European compact issue and defense weapons, it may have been intended for a specific export market.
There are other detail differences in the design that would seem to have led to it being dropped at some point, but instead it was retained for reasons I cannot yet fathom. Also, the D has a full-legth guide rod, and a different (but still removable) barrel bushing. The D seems to be simply a slightly smaller gun, but it is actually slightly heavier in weight and bulk, despite its reduced length.
Star's intentions with its compact pistols are not entirely clear when you compare the D and S series.
