Auction Report Two Rolex Kew A Chronometers Are For Sale This Week At Bonhams

The other Kew A, lot 22, has been cased up in a far rarer, and larger, 18k gold case Records show that only 24 of the Kew A Rolex chronometer movements were cased up in this precious metal, making it one of the rarest Rolexes ever, in addition to being one of the most accurate This watch has a pre-sale estimate of $32,000 to $44,000.

Update: A reader reached out to us to say that upon inspection, the Guillaume balance had been replaced on lot 22 If you look closely at each watch's balance wheel, one can see that lot 21 has the correct Guillaume wheel, recognizable by the split in the rim of the balance wheel, the two metals, and the space between the split and the central axle of the wheel Lot 22's balance wheel has been switched to a newer, monometallic wheel. Source