Genuine World War 2 Hamilton Ship Chronometer model 21 Balance Wheel STAFF (Arbor). The picture of the chronometer is shown in the second picture.  We have been repairing these chronometers for over 30 years and you are getting a good inspected part.  We have seen these advertised here on eBay with broken pivots, so be careful!  Note we sell the repair manual and can send via electronic transfer world wide.  We also have other parts for the Hamilton model 21 chronometer including the escape wheel and pinion, escapement jewels etc.  If you need a hub due to your hub being cracked, see other items for sale.

In case you need dimensions, here are the approximate dimensions.  Note length can vary slightly.  Total length 26.8 mm, roller seat diameter 1.65 mm, hairspring seat 1.52 mm, and hub seat 2.1 mm.

Note we must insure if you buy several, so the postage may be higher depending on your location. 

Foreign orders are welcome, eBay typically collects VAT. Foreign Orders Shipped by eBay Standard International delivery (insured). 

Member  of NAWCC and AWI. Check out our eBay store and watchdoc.com for more information on watch repair, watch parts, etc. Many thanks, Dr. Ed, the WatchDoc.