7.62x54R Blanks

I have one round of 7.62x54R blank ammunition with a VPT 33 (Finnish) headstamp. It has a five petal closure at the neck sealed with black paint. It came in a lot that included several other similar blanks with Russian headstamps dating from the late 20s to 1940. Some are brass and some steel. One of the others is made from a ShKAS case. I