keyless winding twenty jewel movement with lever escapement, wolf's tooth winding, compensated balance, precision swan-neck regulation and eight adjustments, silver-gilt dial with waved engine-turning, subsidiary seconds dial at six o'clock and black Arabic numerals, 18 carat gold plain rounded circular open-faced case carved to back with entwined initials LV in a lozenge, Swiss assay mark to body, back and cuvette stamped '18Kts' and '18K' respectively and both numbered 600530, cuvette engraved 'No.190617 . PATEK . PHILIPPE & Cie . GENÈVE', dial and movement signed 'PATEK, PHILIPPE & Co. / GENEVA SWITZERLAND', movement numbered 190617, hinged bow stamped 'P.P.C.', case 45mm diameter, in its original brown leather covered box with red velvet lining complete with original replacement glass beneath watch pad, the base of the box with Patek Philippe label and corresponding number (190617), the lid with cream silk lining stamped for the maker and pulling open to reveal the original 'CERTIFICATE OF ORIGIN & WARRANTY' with corresponding number (190617) and signed and dated March 28th. 1922

It is interesting to note that the Certificate of Origin confirms the LV monogram on the case back, indicating that this was specially engraved on request at the time of manufacture.