Early bausch and lomb microscope filar micrometer eyepiece. I'm not sure exactly what it does, though this looks fairly old being made of brass. Looks well made. No markings indicating anything like a serial number, etc. but it does say bausch lomb as pictured.

Some noticeable particles in the inner eyepiece. When I turned the knob and looked through the lens, I did notice what looks like 2 springs moving back and forth depending on how you turn the knob.

Selling STRICTLY AS IS OR FOR PARTS ONLY OR AS FOUND.  Please REFER to ALL 24 pictures so you can get a good look at what you will receive.

If you would like some additional pictures or any information regarding this piece please contact me and I will gladly get back to you ASAP 👍. VERY IMPORTANT: PAYMENT IS DUE WITHIN 48HRS HOURS AFTER THE WINNING BID IS COMPLETED.IF YOU WOULD LIKE SOME ADDITIONAL TIME TO MAKE THE PAYMENT WITHIN THE 48HRS AFTER THE WINNING BID IS COMPLETED PLEASE CONTACT ME SO WE CAN WORK SOMETHING OUT .Important side note: I USUALLY GO TO THE POST OFFICE WITHIN 24-48HRS AFTER PAYMENT IS MADE UNLESS THE AUCTION ENDS ON A FRIDAY OR PAYMENT IS MADE UNLESS THE AUCTION ENDS ON A FRIDAY OR PAYMENT IS MADE WITHIN FRIDAY BETWEEN SUNDAY THEN I GO ON MONDAY .