Surplus to my requirements but received after a recent swap.
This rare barlow lens was supplied with Zeiss AS and APQ telescopes. Optically as good as barlows get. 2X magnification but this can be altered by barlow placement in the optical train. M44 threads at each end.
In very good condition. Glass is excellent.
In photo a minor cosmetic blemish on the Bakelite/Metal?? is visible. Otherwise it looks like new.
Price includes airmail insured shipping.
I would consider trades for matched pairs of Tele vue eyepieces.