ID of propelling cartridge

[Beavertail]

I have found a tail fin section (only) and am trying to decifer the stamps, I believe the 2, 6, 10 O'clock positioning is standard. The triangle inside a triangle, I have seen before on warsaw pact ammunition. The 6 O'clock is the date 1967 as I don't see a factory code of 67. This leaves the 20 or 26 stamp at 11 O'clock. 20 being either Taiwan or USSR and 26 being Sweden. Can any one help with a better interpretation?

The mortar tail is 120mm with 12 thin steel fins.

 

[strakv]

"20" on the 50mm and 82mm and "26" on the 120mm propelling charges are not the factory codes. They are the diameter of the cartridge.

 

[Eggburt1969]

As far as I'm aware the 'triangle within a triangle' is the manufacturer's symbol. The 26 seen in the above image is likely the batch number, whilst the 67 is the truncated year of production; i.e. 1967.

Another example the 'triangle within a triangle' manufacturer symbol is in the image below, which is packaging for RDG-5 hand grenades and their UZRGM-2 fuzes.



Unfortunately I've forgotten who the 'triangle within a triangle' manufacturer is? For some reason I keep thinking it begins with a 'P', but that might just be poppycock. Hopefully someone else may remember who's symbol it is?

 

[Beavertail]

Thank you for the very useful information. It makes a lot of sense now you mention it.
On the triangle within a triangle I have been informed outside of BOCN that the factory is Krasnozavodsk. Maybe the P you are thinking of is an assembly plant Penzamash.

 

[Eggburt1969]

Thank you for the very useful information. It makes a lot of sense now you mention it.
On the triangle within a triangle I have been informed outside of BOCN that the factory is Krasnozavodsk. Maybe the P you are thinking of is an assembly plant Penzamash.

No idea why I thought it's name started with a 'P? Maybe mixing it up with 'ZP' (RU: ЗП), as such AO Zavod Plastmass (АО Завод Пластмасс)?

The 'triangle within a triangle' manufacturer is currently transliterated, using BGN/PCGN format (most commonly seen in US and UK military texts), as 'FGUP Krasnozavodskiy Khimicheskiy Zavod' (RU: ФГУП Краснозаводский Химический Завод), so translated to English as 'FSUE Krasnozavodsk Chemical Factory'.

Going by the University of Warwick 'Numbered Factories of the Soviet Defence Industry' (see link below) it's factory numeric is likely '11' (see lines 10292 and 10293).

Soviet Defence Industry

Soviet Defence Industry

warwick.ac.uk

Be warned the 'Numbered Factories of the Soviet Defence Industry' Excel file is humungous!