Check the listing for details. Balance NOS for WWII World War 2 Hamilton model 21 Ship Chronometer. Condition: New without tags. Listed at 199.95 USD. Genuine World War 2 Hamilton Ship Chronometer model 21 BALANCE WHEEL (No hairspring or staff etc). The picture of the chronometer is shown in the second picture. THIS IS for THE BIG Detent MASTER Chronometer!! We have been repairing these chronometers for over 30 years and you are getting a new inspected part. We are running out and only have a few more! 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 balance staff and escape wheel jewels etc. International orders are welcome, but note you must pay any VAT, customs, etc that your country imposes. 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.