Orders of Saint Stanislaus made by Moscow workshop ПК /PК/

For today no exact attribution of Moscow-based workshop that used maker's mark ПК is known.
Orders of Saint Anna made by ПК /PК/ https://asiamedals.info/threads/orders-of-saint-anna-made-by-moscow-workshop-pk-pk.26284/
Orders of Saint Vladimir made by ПК /PК/ https://asiamedals.info/threads/orders-of-saint-vladimir-made-by-moscow-workshop-pk-pk.26289/

Breast star.

Silver, gold, enamel.
Size 83 x 83 mm.
Weight 55.72 g.

Reverse of the breast star marked with "ПК/PK"; screw plate marked with Moscow assay officer silver hallmark "84" with the coat of arms of Moscow.

Under a different light.

 

1st class cross with "black" (dark red) enamel.

Gold, enamel.
Size 60 x 57.3 mm.
Weight 21.07 g.

Marked with "ПК/PK", partly readable Moscow assay office year mark "1869" and gold hallmark "56".

 

3rd class cross with swords in "black" (dark red) enamel.

Gold, enamel.
Size 45 x 45 mm.
Weight 12 g.

Marked with "ПК/PK" and partly visible assay office year mark "1866" .

Marks.

 

3rd class cross with "black" (dark red) enamel.

Gold, enamel.
Size 47 x 44.5 mm.

Marked with "ПК/PK" and gold hallmark "56" .

 

1st/2nd class cross with "black" flat enamel.

Gold, enamel.
Size 53.5 mm.

Marked with a maker's mark "ПК/PK", partly readable gold hallmark "56" and unreadable assay office year mark.

Marks.