KARL LAMBRECHT GLAN LASER POLARIZER MOUNTED in THORLABS ROTATING STAGE + POLE + ORIEL dovetail rail mount.

• Description: removed from High School lab (laser R&D). Given dimensions and lettering, polarizer must be either MGLB10 or MGLA10 (it is 10x10mm square with no windows mounted in round cage). Unfortunately I cannot dismount it from its adapter to know exact catalog number and I won't risk any damage to it by applying too much force. It can be easily dismounted from rotating mount, but not so out of the non-anodized aluminum adapter. You may have more information in last picture (or visit: http://www.klccgo.com/glanlaser.htm). Polarizer seems IR coated (it indeed has light blue reflection under strong light), moreover as I know it was used in IR laser enviroment. Viewthrough is clear. Mounted in THORLABS manual continous rotation mount, similar to LRM1 (it uses same SM1 threads). This rotation mount is mounted in Ø 0,5" pole (with 1/4x20 thread) which in turn is inserted in a 2" dovetail rail mount (with special locking screw ended in plastic spring loaded tip).
• Condition: normal usage marks in mount. Polarizer is in excellent condition. No scratches, nicks, haze or decementing: seems absolutely pristine.
• Offers: feel free to make offers to me. I will gladly combine shipping. In case you buy several items, ask for invoice before making payment. 
• Returns: I gladly accept returns for full refund (you only pay return shipping costs).