Descriptions :
OMEGA Stainless Steel 3-Reg. 12 Hrs Chronograph, Cal.861 (Manual) movement (Same as the moon watch). Circa late 1970s / early 1980s, Grey Dial with rare and (Red / Black) colorful sub-reg. arrangement. 2-Crowns & 2-Push Button, Colorful 24-Hour  Inner Bezel Rotate by Crown at 10:00, Orange Hour, Minute & Second Hands for time. White hands for Chronographs function. Plastic crystal. Screw Back with "SeaHorse" Logo.

This model has been notified as a "YACHT CLUB" model made for sailing. 

Dial :
Signed and original dial appears to be in Excellent / Mint condition with very colorful sub-reg dials. Hands are in reasonably good condition with slight lighten in color for the Hour & Minute hands. The colorful inner rotating bezel appears to be in good condition except the very tiny mark appearing at 6:00 position next to the number "16 & 18" as shown on scan. Otherwise, Mint condition.

This is a rather unusual vintage Seamaster Chronograph with rare & attractive colorful dial. The dial itself has a mat. grey finish and a white outer ring with minute & second divider. Sub-Dial for chronograph 30 minute and 12 Hour counter are in Black & Red color. 

Case :
Signed and original Stainless Steel case with screw back cover (signed with Seamaster / Seahorse logo / 120 Waterproof) appears to be in excellent condition with no visible damage. Crowns and pushers are all in good condition. Plastic crystal is in good condition. This watch comes with believe to be original signed SS bracelet.
Movement :
Signed and original 17 Jewels Cal. 861 manual wind movement appears to be in nice and clean condition.
Remarks :
Watch do runs well and keep reasonably good time.