Omega Seamaster Cropped 3-6-9 Dial

Omega Seamaster Cropped 3-6-9

Omega Seamaster Cropped 3-6-9 Dial
The great thing about this hobby is that it allows my OCD to really shine. In this section, it’s all about a dial. A specific dial seen on Omegas (most often Seamasters), with cropped 3, 6 and 9 numerals. More details on these watches, and others, at bottom.

Omega Seamaster 3-6-9 Cropped Dials
Omega 3-6-9-Cropped Dials
Omega CK 2451
The CK 2451 was introduced in 1946 (, and utilized the 27 CHRO C12 T1 and 27 CHRO C12 T2 movement, renamed as the 321. The 27 refers to the diameter of the movement in millimeters, ‘CHRO’ to the fact that it has a chronometer, and C12 to refer to the 12-hour counter. This co-developed project began in 1942. The 321 ended its initial production run in 1968.

Omega provides sparse notes on the CK 2451, only that it has a dial with inside tachymeter scale (though that is not the case for the CK 2451 dials below), and caliber 321 (though not all are stamped as such, coming from earlier in the 321 lineage). We see two square lume marks at 12. Note we do not see ‘Seamaster’ in the dial.

CK 2451-6
Hashtag watch offered this Omega CK 2451-6 with cropped 3-6-9. There is no indication of SWISS MADE at bottom.
Movement number: 15146571
Caliber: 321

CK 2451-8
Aligned with the 14364-1, we see this Omega CK 2451-8 from Bachmann & Scher.
Movement number: unknown
Caliber: 321 per text

Omega Seamaster CK 14364
The Seamaster CK 14364 was introduced in 1959, and utilized the Caliber 321, the evolution of the 27 CHRO C12 T2. Sparse Omega notes indicate that the CK 14364 was produced with a stainless steel screw-in case, and luminous (radium) dial with hand riveted solid gold hour markers and “index” hands. Water resistance was to 30 meters. As with the 2451s above, we see two square lume marks at 12.

This dial is the same as seen on later CK 2451s as seen above, not surprising given that this would have followed CK 2451 production.

CK 14364-1
Owned by a Swiss farmer, this Omega Seamaster CK 14364-1 was sold by Eric Wind at Wind Vintage, and is another cropped 3-6-9 dial example with radium.
Serial: 177xxxxx
Caliber: 321 (stamped)

Another cropped 3-6-9 Omega Seamaster CK 14364-1, sold via Analog-Shift.
Movement number: 177xxxxx
Caliber: 321 (stamped)

Unknown reference and serials
From Theo & Harris we see another Seamaster cropped 3-6-9 dial, with Hippocampus on the caseback. As we can see in the accompanying Theo & Harris video, it needs a service.
Movement number: 17765707 (?)
Reference: unknown
Caliber: 321

Posted by huliofive, this watch closely resembles the others, with the two square plots at 12. My guess is that this is a CK 14364-1, though I do not know the reference.
Caliber: 321 (per text)

Unknown reference and serials, related
Not shown in the image on this page, posted by thekirkland, this watch has a tritium dial (per text), and a single plot at 12. My guess is that this is not a CK 14364, though I do not know the reference.
Caliber: 861 (per text)

We see some other IG members (@verylongines, @frederick_gva) reference their pieces with similar dials, but I am unable to find images.