Rettberg 

Bubble Counter
Rettberg

Modified, with cone size NS 14 / 23, DURAN®-glass, for use directly on the apparatus, with threaded socket for filling in oil.
Bubble Counter  Rettberg
DescriptionPUOrder No.in StockPrice/Unit/NOK 
Bubble counter15012572-817.00Order
Accessories:
High-vacuum silicone greases KORASILON / Kurt Obermeier