Genuine World War 2 Hamilton Ship Chronometer model 21 ESCAPEMENT JEWEL to fit either escape wheel and/or the balance wheel. Note this jewel may work for other chronometers and clocks.  The dimension of bushing diameter ~ 5 mm.  To be clear, the price is $19.95 for ONE jewel.  The picture of the chronometer is shown in the second picture.  Note we sell the repair manual and can send via electronic transfer or thumb drive.  We also have other parts for the Hamilton model 21 chronometer including the balance staff. balance wheel, escape wheel, mainspring,  etc.

Note we must insure if you buy several, so the postage may be higher depending on your location.  Foreign orders are welcome, but note you must take care of any VAT, customs, etc that your country imposes. eBay now collects those fees.  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.