Generic Eyepiece (No 6)

item #eyepieceNo6. 1 1/16" diameter, 1"+ long. The glass is 5/8" in diameter. This has a ground glass built into the bottom of the eyepiece. There is a square grid etched into the bottom of the glass. The power is unknown. This looks to be of good quality. This could be for something else like a microscope?? Condition 8+.