勞力士，非常罕有及精細，18k金鏈帶腕錶，配中心秒針及日曆顯示，型號5100，約1971年製

The Quartz Rolex, reference 5100, was introduced in 1970 using the famous Beta 21 quartz movement which was accurate to 5 seconds per month. It was immediately so successful that the initial pilot series production was completely sold out prior to delivery. It was revolutionary for the new case design, much more angular in its shape than the Oyster case. Designed to be made in very limited quantities only, each Rolex Quartz is engraved with the limited edition number, in this instance No. 119 which is early in the series.