"Polar Star" Order.

[HuliganRS]

Here's Type 1:

[HuliganRS]

Here's Type 2. Looks identical to Type 3 except for the writing on the banner:
(1940) screwback.

[HuliganRS]

This is Type 4 (1970):

Pinback.

[vatjan]

There are several variations of these basic models.
Here are the different variations I have observed so far, with high and low serial numbers (errors are most likely since I've gotten most of this info on internet)
Type 1, I have no idea, I've only seen two so far SN 751, 792 (both only pictures)

Type 2 V1 Serial number 6 o'clock position, Monetnyi Dvor 12 o'clock, SN low 781 SN high 2654

Type 2 V2 SN 7 o'clock, no MM (might be a picture mistake on a big dealer's website)
I've only seen one so far SN 1158

Type 3 V1 concave reverse, SN 7 o'clock, SN l 2153 SN h 5052

Type 3 V2 flat reverse, SN under screwpost, SN l 5094 SN h 8512

Type 3 V3 flat reverse, SN 6 o'clock SN l 11233 SN h 14828

Type 4 V1 SN l 16459 SN h 29258

[yolkin]

To confirm Rusty's previous post, here is an illustration of the various types:

1. Old Mongolian symbol “Soyombo”
1.1 Plain symbol 1924-1939
1.2 Plain symbol with laurel branches 1939-1945
1.3 Plain symbol with a star at the top to commemorate the victory over the militarist Japan 1945-1992

2. Animal stamps displayed as heraldic figures
2.1 With Mongolian inscriptions on the red banner 1940-1941
2.2 With Cyrillic inscriptions on the red banner “БНМАУ” 1941-1960

3. Mechanical gear at the bottom, with a red-blue banner 1960-1992


Thanks,

Eric