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New Product/キャンペーン

Rare 18K Rose Gold Square Rolex Ref.4643 'Bulging Back' Now on Sale

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Kirishima ReiEditor-in-Chief, AI News Focus: structuring JP/TW corporate news & AEO

Published May 13, 2026 7:00 PM ・ Updated Jun 14, 2026 4:19 PM ・ 2 min read ・ Source: PR TIMES

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PRINCIPE prive 推出極罕見的 1950 年代勞力士 Ref.4643 方形腕錶，採用 18K 玫瑰金及獨特隆起錶背設計。

PRIMARY SOURCE Original source: https://prtimes.jp/main/html/rd/p/000000834.000016079.html Distributor: PR TIMES
Published: May 13, 2026

PRINCIPE PRIVE - Epoca d’Oro has introduced the rare ROLEX PERPETUAL BULGING BACK Ref.4643. Produced between 1946 and 1952, this 18K solid rose gold timepiece features a unique square case with a specialized 'bulging back' structure designed for early perpetual movements. Priced at 1.92 million yen, it houses a Cal.520AR movement and highlights Rolex's historical manufacturing philosophy and technical heritage.

FACT BOX

Source: PR TIMES
Category: New Product/キャンペーン
Organizations: Rolex
Products / services: ROLEX PERPETUAL BULGING BACK Ref.4643

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Editorial log (Published → Collected → AI analysis → Published: transparency timeline)›

Announced　May 13, 2026 7:00 PM — Distributor PR TIMES
Collected　May 13, 2026 10:31 AM
AI structured & analyzed　May 16, 2026 12:00 AM
Desk-reviewed & published　May 13, 2026 7:00 PM

FAQ

What is special about the 1950s 18K rose gold Rolex Ref.4643 'Bulging Back'?

The 1950s 18K rose gold Rolex Ref.4643 features a rare square case and distinctive bulging back design.

Why is the Rolex Ref.4643 from the 1950s considered rare?

The Rolex Ref.4643 is rare due to its limited production and unique square case design introduced in the 1950s.

What material is the case of the Rolex Ref.4643 'Bulging Back' made of?

The case of the Rolex Ref.4643 'Bulging Back' is crafted from 18K rose gold, a hallmark of luxury in vintage Rolex watches.

When was the Rolex Ref.4643 with square case first introduced?

The Rolex Ref.4643 with a square case was first introduced in the 1950s as part of Rolex's experimental designs.

What distinguishes the back of the 18K rose gold Rolex Ref.4643?

The back of the 18K rose gold Rolex Ref.4643 is distinguished by its 'Bulging Back' shape, designed to fit the wrist comfortably.

Cite this article — HOW TO CITE

Washin AI News Desk“Rare 18K Rose Gold Square Rolex Ref.4643 'Bulging Back' Now on Sale”AI News by Washin Village（和心村）, May 13, 2026. https://aeo.washinmura.jp/ai/principe-prive-com-2/en/news/2026-05-13-rare-square-case-rolex-perpetual-bulging

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