Appears to be a .22, but quite an odd action. If I've guessed at it's operating correctly, you put round in the "chamber" manually, OVER the tabbed lever that hinges right there. After firing, you use the little lever to eject the casing.
Anyone got any info on this thing?
Only info I have on it is the little stamping barely perceptible in this picture. (but on the close up it's better) The stamping is slightly oval, "E" on top, "L" on left, "G" on right, and perhaps a small "R" at the bottom. Hard to tell on the "R" though. Below that stamp appears to be a "Z" with a star over the top of it. Also guessing on the star, it's pretty tough to tell for sure even in person.