The reference 5513 is the archetypal no-date Submariner: a 40 mm steel Oyster case water-resistant to 200 metres, a rotating dive bezel, a screw-down crown and case back, and a clean dial with no date window to interrupt the symmetry. Introduced in 1962 and made until 1989, it was powered first by the calibre 1530 and then, for most of its life, by the calibre 1520 — automatic, 26 jewels, hacking, no quick-set date because there was no date at all.

Its details are a collector’s grammar: lug-to-lug around 47 mm, thickness about 14 mm, a 20 mm lug width, and early 1962–63 cases with the sought-after pointed crown guards. Over nearly three decades the dial changed from glossy gilt to matte to glossy again, and the crystal stayed acrylic — the “Tropic” — which is why so many survivors still look right. There is a reason it was the professional’s Submariner: nothing to go wrong but time.

For the watch community the 5513 is the reference dive watch — cheap enough to have been worn hard, important enough to be collected seriously, and varied enough that dial and case specialists can spend decades on it. It is long discontinued, replaced in stages by the 14060, and prices for early pointed-guard and gilt-dial examples have moved far beyond tool-watch money, which tells you exactly how the market now reads it.