Tudor Reference 90630 – Overview

• The Tudor Ref. 90630, produced around 1981, houses an automatic ETA 2784 movement. It is a vintage Prince Oyster (sometimes “Oysterdate”) model with a 34mm stainless steel case 

• The case back typically bears the inscription "ORIGINAL OYSTER CASE BY ROLEX GENEVA", highlighting Tudor's Rolex heritage

Engine-Turned Bezel — Was It Used on Ref. 90630?

• While the Ref. 90630 itself isn't widely noted for an engine-turned bezel, Tudor did release the Ref. 9061/0 around the late 1970s, which is explicitly described as featuring an engine-turned bezel and often a striking sunburst dial mjwatches.co.uk.

• A 2019 Reddit listing for a Ref. 9061/0 also confirms its unique styling:

  “...this ref (ref# 9061/0) has the somewhat unique "Engine Turned" bezel.” Reddit

• Therefore, while both references—90630 and 9061/0—are of similar vintage generation and aesthetics, only 9061/0 is definitively associated with the engine-turned bezel design.

engine-turned bezel is a vintage Rolex design hallmark — subtle, sporty, discontinued, and collectible today.

What is an Engine-Turned Bezel?

• A decorative bezel style featuring alternating polished and textured (grooved) surfaces.

• It creates a subtle pattern of light play, different from smooth polished or fluted bezels.

• Less flashy than fluted gold bezels, but more detailed than smooth ones.

• Typically made in stainless steel, so often found on entry-level Rolex models.

🔹 Rolex Models with Engine-Turned Bezels

1. Rolex Oyster Perpetual Date / Datejust (34–36mm)

   • Engine-turned bezels were available as a sportier alternative to the smooth or fluted styles.

   • Common in Refs. 1500, 1501, 1603, etc. (1960s–1980s).

2. Rolex Air-King (34mm)

   • Some references (like Ref. 14010) used an engine-turned bezel, adding a touch of character to this understated model.

3. Rolex Oyster Precision

   • Vintage manual-wind pieces (Refs. 6426, 6694, etc.) could be found with engine-turned bezels.