Platinum Chronometer no. 20458

Case: Platinum, engraved, ERT monogram to reverse, inside case back engraved "Mother's last loving remembrance" Dial: Silvered, signed "Haas Neveux", digital triple calendar display, blued steel Breguet hands Movement: Very thin nickel movement, Geneva Seal, bi-metallic balance with flat blued steel balance spring secured by polished steel kidney piece, impulse jewel set into arm of balance, hanging mainspring barrel with Geneva stopwork. This type calibre also sold by Audemars Piguet identical, as well as center seconds #40509. Also sold by Vacheron & Constantin #case 250332 mvmt 400452 both with sub seconds and moon both 1925, #case 251477 mvmt 409222, mvmt 409302, mvmt 410211 (sold Antiquorum) all sub seconds and 1926, #case 252349 mvmt 403488, case 252315 mvmt 403854 all sub seconds and moon all 1927, #case 257285 mvmt 412569 (sold Antiquorum & Sotheby’s) sub seconds 1930. V&C Sub seconds movement substantially different with central center wheel and offset under dial motion work. Identical calibres: 20433, 20453, 20457, misc42 Provenance: 19?? - Haas Neveux, Geneva 19?? - "ERT" 2015 - eBay #291450302303 Santa Rosa, California $2508.88 reserve not met May 2015 seller "oldetown" 2015 - eBay #391143253777 2018 - eBay #261915633792 Oregon $4,995 seller "simpateko" 2018 - Private collection