Vintage SEIKO 6309-735M R, ca. 1977 (from Tim)

Since Tim and I both have skinny wrists (6 1/2 inch)...
This bracelet sits perfect in it's smallest position. The teething on the inside of the clasp of my Olongapo only allows for an additional bracelet length of ca. 1 cm. So if you are going to buy such a bracelet, make sure you ask the seller to make one for your wrist size.