How many Soviet battleships could exist by 1943?

How many of the Soviet plan's fifteen battleships could have been built by 1942-43 without a German invasion?

Probably two or three in service, largely in the Baltic, if the industrial plans worked as intended.

Even without a German invasion, Soviet output depended on the second and third Five-Year Plans delivering the required industrial capacity. Perhaps two or three ships, mostly Baltic units, could enter service, although an earlier Project 21 start might change that path.