ROLEX REF. 3131 BUBBLE BACK PINK GOLD Rolex, Oyster Perpetual, Officially Certified Chronometer, Ref. 3131. Made circa 1940. Fine, tonneau-shaped, center seconds, self-winding, water resistant, 18K pink gold wristwatch with a pink
At Auction: ROLEX Oyster Perpetual 14K Gold Auto Bubble Watch, Ref 3131, c.1950
WTS] Rolex Bubbleback ref. 3131 in 14k Gold : r/Watchexchange
Vintage of the Week: Rolex Bubbleback Reference 3131
Rolex Bubble Back Ref.3131 Gold Pg Ivory 1947 550 Number Second Hand Antique Men | eBay
Rolex Rare Bubble Back Ref. 3131 14kt Pink Gold | Vintage watches, Rolex, Pink and gold