Here is a reference 5626-5040 circa 1974 vintage Seiko high beat chronometer vintage watch measuring 35x40mm. lug-to-lug in a stainless steel beautifully preserved case having its original finish. This Seiko has a day/date feature with a quickset adjustment for both. This movement sparkles (sorry we don’t want to disassemble) and is VERY accurately keeping time. This high beat movement pulses at 28800 BPH and has achieved chronometer standards. This is the type of watch you can wear for a lifetime-extremely accurate and reliable.