Vintage Princeton Tectonics Bottom Timer Stop Watch Filter For use in all SLR

For use in all  SLR

[COMPLETE SET] Comes included with a heavy duty dual action hand pump with pressure gauge

Large Teardrop Shaped Window Design Offers Extended Vertical Field of View

BCD is equipped with torso adjustable shoulder straps

a backlit color display

Vintage Princeton Tectonics Bottom Timer Stop Watch Filter For use in all SLRVintage Princeton Tectonics Bottom Timer Stop Watch. This is untested in water. The crown does pull out with allows the needle to be rotated to the 0 position, but any further functionality is unknown. It is a great collectors piece. Included is the original user manual from 1980.