I got this with a bunch of NOS Vixen telescope and mount parts (see my ads in "Refractors" and "Mounts,..."). I am 99% sure it is a Vixen part. It is a 120mm lens/cell, a doublet, no provision for collimation (no screws on side of cell, small bright silver tabs to air-space the two elements, large lock ring on one end, like a photographic lens, to retain lenses). It will form an image about 56" away (!). I wonder if this could be the front half of the VX120, a 4-element/2 group design? Large threads on both ends are about 137mm, one for the tube, one for the dew shield I would think. If anyone can identify this please email as I would like to sell it but won't offer it up until I know what it is. Thanks. Tom Duncan
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