To be honest after seeing your thread my flame got reignated and I asked for my brothers 3520.50 Prices are lately below average for 3520.53 so I wanted to see whether I can pull it off, but I can't, it's either unbalanced or very heavy at 120grams with full bracelet, so it's definitely for bracelet lovers - most comfortable for me was with a leather bracelet strapped beyond comfortably tight(!) - Omega milanese bracelets are also ok.
Thinking the comfort level and the balance might be unduly affected by wrist size? (Mine is 7 1/4"). Based on 120 grms I figure my Hamilton is similar in size and weight as the 3520, on a steel bracelet, and I never know I'm wearing it Wrist size is also a proving to be a problem with buying from Japan....I'm definitely going to have to find extra links if I do! As an aside Omega could perhaps take a line from the Hamilton bracelet...the quick release clasp really is superb.
I just won a Mark 40 3513.53 on eBay from a very reputable seller. Box and papers included, excellent running and cosmetic condition for $1800. Very excited! Now, I need to offload my B&M Capeland XL and Seamaster ref. #166010.