The back of the case is engraved (stamped?). It has a centre sweep second hand. For well over its 40 years of life it has slumbered in the back of a drawer undisturbed.
eBay
Rubber Watchband for omega Planet Ocean 600 Quarter Orange Seamaster 300 watch strap 20mm 21mm 22mm silicone watchband
Aliexpress UK
The stainless steel case is in excellent condition and presents exceptionally well. The original Seamaster hippocampus caseback engraving remains clearly visible. 611 – REF. This example features a beautiful grey linen dial paired with elegant gold-tone baton hour markers and matching hands, giving the watch a refined mid-century aesthetic.
eBay
Watchbands Bracelet For Omega Planet Ocean 007 Seamaster 600 Metal Strap Watch Men Stainless Steel Watch Band Chain 18mm 20mm
Aliexpress UK
Rare blue Dail omega manual watch . It is in good condition and keeps good time . It comes with non omega rice of beeds bracelet. Size approximately 36 mm
eBay
Nylon Rubber Watch Band Fit For Omega Seamaster 300 Planet Ocean 600 Black Canvas Orange Silicone Strap 20mm 22mm
Aliexpress UK
This is a rare and desirable model which was manufactured in 1965. This is a particularly rare example as it was a military issue to the Afghan Air Force in the 1960s, as can be seen by the caseback markings.
eBay
19mm 20mm 21mm 22mm Leather Rubber Watch Band for Omega Seamaster 300 Planet Ocean 600 Black Orange Yellow Green Silicone Strap
Aliexpress UK
Has fully working date feature and unusual dial with part numbers and part batons.
eBay
22mm 21mm 20mm Nylon Watch Band For Omega Planet Ocean 600 strap Seamaster 300 Rubber Strap Seiko SKX Curved End Men Bracelet
Aliexpress UK
A classic Omega Seamaster 600 from around 1968, featuring a striking black dial and timeless vintage design. This iconic automatic watch is highly collectible and perfect for enthusiasts of vintage Swiss timepieces. Details: Brand: Omega Model: Seamaster 600 Circa: 1968 Dial: Black Movement: Automatic Case Material: Stainless Steel Condition: Used, good condition Key Features: Iconic Seamaster design with black dial Vintage Swiss craftsmanship Reliable manual/automatic movement Elegant, versatile style suitable for collectors and daily wear Condition: Used, fully functional Light signs of wear consistent with age Crystal and dial in good vintage condition Original crown and case preserved
eBay
For Omega Speedmaster Seamaster Planet Ocean 300 600 Series Curved Interface Folding Buckle Steel Watch Strap 20 22mm Bracelet
Aliexpress UK
The OMEGA Seamaster Case 14750 SC-61 Cal.600 SS Vintage Men Antique P-153 is a high-quality replacement case designed specifically for Omega Seamaster watches. This vintage piece is compatible with antique Omega models, offering a classic and authentic design for repairs or restoration projects. With the trusted OMEGA brand name, you can be confident in the quality and compatibility of this case for your cherished timepiece.
eBay
For Omega Seamaster 300 600 Premium Steel Watchband Durable Smooth Edges for Wrist Comfort Special Interface Folding Buckle
Aliexpress UK
601: excenter regulator. 600: Reed's regulator. Other data: balance staff: U2769 stem: W2794 / W3136 wrist / pocket watch stem ronda: 1396 (12) Mainspring: 1.050 x 9.500 x 0.120 x 360.000 mm. Power Reserve48 hours.
eBay
20mm 22mm High Quality Leather Cowhide Rubber Watchband fit for Omega Seamaster Planet Ocean 600 GMT Orange 19/21mm Watch Strap
Aliexpress UK