Polish 10x99

Any information on this Polish 10x99 anti tank round? What weapon fired this cartridge? Anybody read Polish? I can not read what is written underneath and do not have a better sized picture.

I may be able to help you but I believe even a native speaker cannot decipher the text under this photo.

click on the picture and it enlarges it just a bit. I would assume the English caption below, much of which can be read, is a translation of the Polish.

The resolution is too poor to read anything, but I do see the word experimental in there somewhere

This polish experimental anti-tank cartridge was designed in 1939. It’s based on the 13,2 x 99 mm Hotchkiss Mle 30 case (no headstamp). The real bullet diameter is 10,35 mm.

Check this previous post:

iaaforum.org/forum2/viewtopic.php?p=33301#33301