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> Lot of 2 - sight-pipe optical viewers
Lot of 2 - sight-pipe optical viewers
Lot of 2 - Sight-pipe Optical Viewers. One unit is catalogue number 317-199, the second is SP-550. The units are in good cosmetic and working condition. They comes as shown in the photo.
* # 317-199 (http:// /regser1.htm)
* Viewing Field: 90 Degree
* Outside Diameter: .990" (ie for 1" Diameters)
* # SP-550 (http:// /360tube.htm)
* Viewing Field: 360 Degree
