GENUINE Rolex Balance Stop Spring — Calibre 1525 / 1520 / 1530 / 1570 — in Original Seal Part #8073. Compatible with Rolex Oyster Perpetual, Datejust, Submariner, Air-King, Explorer, and Date references (Cal 1520 / 1525 / 1530 / 1560 / 1570).
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