

VINTAGE SEAMASTER QUARTZ DILEMMA
Hello fellow Omega fans,
I find myself in a bit of a dilemma and could use some advice.
A month ago, I bought a vintage Omega Seamaster Quartz (Ref. 196.0073, Cal. 1315) and took it to my watchmaker for a full service.
Mechanically, all the parts were clean. However, after the service, the watchmaker noticed a daily loss of about 20 seconds.
Shortly after, I managed to pick up the exact same model for a very low price as a gift for my father, it was a lucky "attic find." Surprisingly, this second watch only loses about 1 second per day, which is significantly better than mine.
Now, my father feels the watch is too small for him, which leaves me with both. I need to decide which one to sell and which one to keep:
Watch 1: Freshly serviced, but losing 20 seconds a day.
Watch 2: Unserviced (attic find), but running beautifully at -1 second a day.
Absolute accuracy isn't my main priority, but I am worried that the 20 second delay on the serviced watch might indicate a failing electronic circuit or block.
What do you guys think? Which one should I keep?