KERN K1-A THEODOLITE COLLECTERS.
Don't know much about this item but I know it's collectible. "... the threaded nipple is where power comes into the instrument. It requires a special connector and battery kit to provide power. There are no light bulbs inside the instrument and indeed the two sockets at the illumination window will provide power to an accessory lamp. If you test the sockets you will find they are connected to the nipple. The adjustment screw on the left hand vertical support most likely is the adjustment screw of the compensator for the vertical circle. Your instrument is a K1A, where the A stands for Automatic, automatic in the sense that the vertical circle is compensated and settles automatically to have zero at the zenith (provided that the instrument is levelled within a certain tolerance, normally when the bubble of the circular vial is within the engraved circle)." £250 or sensible offers. PHONE TEXT OR WHATSAPP . John. Can post if required. Ad ID: Delivery Service Consumer Credit