Soviet 30x165 Markings

I have a Soviet 30x165 Dummy round ith the following markings:

Stamped into nose Fuse:
5B-И-Д-670M

Stamped into projectile:
УЧ-[arrow]-90

Printed on Case:
3ПУ 20
УЧEБHO-
TPEHИP.

Headstamp:
7 УЧ

Can anyone give me any information on what these markings translate to?

[quote=“Falcon”]I have a Soviet 30x165 Dummy round ith the following markings:

Stamped into nose Fuse:
5B-И-Д-670M

Stamped into projectile:
УЧ-[arrow]-90

Printed on Case:
3ПУ 20
УЧEБHO-
TPEHИP.

Headstamp:
7 УЧ

Can anyone give me any information on what these markings translate to?[/quote]

УЧ. УЧEБHO-TPEHИP - for training

Thanks linnet, are any of the other markings on the round a date?

A-670M is the designation of the fuze. The other characters in the same row are the lot number

On the projectile there are also the lot-factory-year codes. УЧ stands for УЧEБHO which means training lot

Regards,
Vince

Thanks, what factories used the code of the small arrow (on projectile) and number “7” (headstamp)?

What is the actual English translation of “УЧEБHO-TPEHИP”?

I hade a fired Dutch 77x277R case headstamped:

-------C.75.TR
LOT 7----------1938
---------O.M.

The primer is a standard large 3-Slot screw-in type. It is marked:"[A.F.M.]" 310. It also has the very small numbers “51” in one slot and “34” in another. Who manufactured the case and primer? Any info would be helpful.