Seamaster 300 Heritage Clasp Micro Adjust and link Specs

M'Bob · Oct 12, 2025

I measured the distance between three holes on an older flat-link bracelet clasp. It’s 6mm.

I understand on the current, 2nd generation Seamaster 300 Heritage clasp, there are also three micro adjustment holes, but I’m guessing the spread is not as large. Can anyone give me an accurate measurement of the distance between the three holes? Thanks.

502 to right · Oct 14, 2025

M'Bob
I measured the distance between three holes on an older flat-link bracelet clasp. It’s 6mm.

I understand on the current, 2nd generation Seamaster 300 Heritage clasp, there are also three micro adjustment holes, but I’m guessing the spread is not as large. Can anyone give me an accurate measurement of the distance between the three holes? Thanks.

I measure 2mm between each of the three settings. So 4mm between the tightest setting vs. the loosest setting.

M'Bob · Oct 14, 2025

502 to right
I measure 2mm between each of the three settings. So 4mm between the tightest setting vs. the loosest setting.

Appreciate it.

M'Bob · 2026-08-23T17:59:34-0500

Resuscitating an older thread: on the second generation Heritage 300 Seamaster bracelet: does anyone have an accurate measurement of the length of the full link, and then the half link? Thanks.

Seamaster 300 Heritage Clasp Micro Adjust and link Specs

M'Bob

502 to right

M'Bob

M'Bob

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