Circa 1960-1961.
Here is a vintage Hamilton Thin-O-Matic T-402 watch in a 10K yellow gold-filled case with 14K gold numerals and markers with a pearled track. The band is an original for this model and the case measures approximately 33mm wide x 38mm in overall length. Beneath the dial is a Swiss unadjusted Hamilton grade 666 automatic movement with 17 jewels that runs strong and kept good time over a 24 hour period. The inside back case reads: Hamilton W. Co., Lancaster PA., 10K Goldfilled, S567557, S&W.
Here is a vintage Hamilton Thin-O-Matic T-402 watch in a 10K yellow gold-filled case with 14K gold numerals and markers with a pearled track. The band is an original for this model and the case measures approximately 33mm wide x 38mm in overall length. Beneath the dial is a Swiss unadjusted Hamilton grade 666 automatic movement with 17 jewels that runs strong and kept good time over a 24 hour period. The inside back case reads: Hamilton W. Co., Lancaster PA., 10K Goldfilled, S567557, S&W.