Case No.238121, Movement No.133250, Circa 1920
Jewelled lever movement, going barrel under the plate, bi-metallic compensation balance, blued steel hairspring, polished steel regulator, engine turned gold dial, outer minute divisions, black Arabic hour numerals, blued steel hands, subsidiary seconds, finely engraved foliate design case back with central monogram 'BSR', cuvette engraved 'No. 133250 Made for Tilden-Thurber Co. Providence. By Patek, Philippe & Co. Geneva', case, cuvette, movement and dial signed, case, cuvette and movement numbered 47mm.