Dolf

Same, reverse, S/N 23453. Dolf

Another 1st Class, screwback, T1V2. (Apparently a A 34.1) This one I call it MB (Medium Blue) Obverse: Dolf

Same, reverse, S/N 2829. Dolf

Last series, those Mongolian Orders of Mother Heroine. Mother Heroine 1st Class, screwback, T1V1 (apparently A 33.1) According to Jan it seems there are different types of blue on the central medallion. I call this one LB (Light Blue) Obverse: Dolf

Ed, Oh! I'm sorry but I don't think I can help with those "minor" (or too deep, depending on the point of view, of course) details I guess I'll have to read all those threads you mention Dolf

Ed, What "puzzle of the Polar Star" you mean? Is there a puzzle to disentangle? As far as I know these I posted are all the know Types and variations of the OPS I know! Apart for the T1 (1939 Type) which I don't have, and a variation (?) of the T5 brass without a S/N, which I also don't have. Dolf

Same, reverse, S/N 39785. (This is the recent brass type, for sure not as nice as the previous types) Dolf

And finally, a OPS T5. Obverse:

Same, reverse, S/N 16435. (This is obviously a pinback type, with the coat of arms of the 1960 type) Dolf

And another OPS, T4. Obverse: Dolf

Same, reverse, S/N 13100. (This variation has the S/N at 6 o'clock)

Another OPS, T3V3. Obverse: Dolf

Same, reverse, S/N 8412. (This variation has the S/N below the screw, completely under the screwplate) Dolf

Another OPS, T3V2. Obverse: Dolf

Same, reverse, S/N 5828. (This variation has the S/N at 7 o'clock. None of the Type 3, or T4 or T5, has a MM) Dolf

Another OPS, T3V1. Obverse: Dolf

Same, reverse, S/N 1617. (This variation has the MM slightely curved downward) Dolf

Another OPS, T2V2. Obverse: Dolf

Same, reverse, S/N 696. (This variation has the MM slightely curved upward) Dolf

Not sure what you mean by that... Anyway, here are the individual pics of those OPS, front and back, from left to right on my Display. OPS T2V1. Obverse: Dolf

And the external view: Dolf

By the way, here is a Doc for one of these Udarnik Badges. Inside view: Dolf

Jan, Like this one I'm posting, right? All mine are also of this type. Cheers, Dolf

Jan, Thanks a lot for the prompt reply and clarification Dolf

Ed, I have one of these screwplates, but for one of my Khalkhin Gol Badges, the flat reverse Type. The mirror reverse Type of my Kalkhin Gol Badge has a different screwplate. As all my Udarnik Badges (the entirely goldplated, the partially goldplated, the silver grade and the bronze grade) have the same kind of screwplate (as the one shown on the reference book mentioned above, as on my pic above) I believe mine are the right ones for this Udarnik Badge! Replacement screwnuts are very, but really very usual on Mongolian awards, as we know Just my two cents, Dolf