Help to identify this watch

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New to the forum, glad for the help. I got this watch after my father passed away a few years ago. I was thinking it was a De Ville gents watch from late 60s or early 70s, but haven't been able to identify it exactly. Here's what I do know: 29mm case, manual winding cal 625 movement, inside case back lists 20 micron gold plating over stainless steel and code DD6346. Two handed watch without any additional branding on the dial besides the Omega logo and brand. Looks like it was last serviced in 2006 and it performed pretty well on the timegrapher. Any thoughts?
 
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Not Dennison, it’s too late as it’s from the mid 1970s but it will be by another UK casemakerr. At 29mm with a no second hand 625 movement that is more likely a ladies watch IMO, though it is described as unisex on one online listing I found after a quick Google search.
Edited:
 
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Not Dennison, it’s too late as it’s from the mid 1970s but it will be by another UK casemakerr. At 29mm with a no second hand 625 movement that is more likely a ladies watch IMO, though it is described as unisex on one online listing I found after a quick Google search.

A number of men's dress watches from the seventies came with cal. 625 movements, but today I find it unlikely that a watch like this would appeal to many men.
 
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Amplitude is quite low if that is fully wound dial up, but a photo like that on it's own doesn't tell you much.

If it is fully wound and dial up or down, the movement needs servicing.
 
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A number of men's dress watches from the seventies came with cal. 625 movements, but today I find it unlikely that a watch like this would appeal to many men.
Common size for the time period, but quite small by our current standards. It wears almost like a tank due to the integrated bracelet.
 
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Amplitude is quite low if that is fully wound dial up, but a photo like that on it's own doesn't tell you much.

If it is fully wound and dial up or down, the movement needs servicing.
Face down. Not fully wound, just want to see if it was working. I left it face up and wound it each morning for about five days and was about 45 seconds fast. Haven't worn it because I don't think there's anything but fond memories holding the crystal to the case.
 
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Not Dennison, it’s too late as it’s from the mid 1970s but it will be by another UK casemakerr. At 29mm with a no second hand 625 movement that is more likely a ladies watch IMO, though it is described as unisex on one online listing I found after a quick Google search.
Any idea what the reference number for this watch might be?