The watch is not underwound - please do not excessively wind the watch manually - If you go beyond 30 half rotations you run the risk of jamming the movement - I actually did it - it did not appear to damage the movement - but after that manual wind did not have a silky smooth operation like it did before - to start a dead watch manual wind 10-15 half turns and give it a little shake. If you ever start feeling the crown getting “tight” don’t wind any further - just shake set the time and wear.
10 seconds per hour is way way off. Out of the box the movement should be within 10-15 seconds per day. An amplitude of 270-310 is fine - 300 is about perfect. Beat error below 0.5 is acceptable - most out of the box are 0.0 - 0.2.
Your watch needs to be regulated - easily done by yourself with a little patience. A 29.5mm lug to remove the back case and a timegrapher (order from Otto Frei in Oakland) are all you really need. To regulate the movement (ie make it run faster or slower) you need to adjust to regulator arm - which is the top arm of the scissor like set of arms at the 9 o’clock position in the pic below. Start by putting it on a timegrapher to see wear you are. If you’re gaining 10 seconds per hour you’ll see a heinously large number like 500 sec per day. Rotate the lever clockwise a millimeter at time until you get with it 30-40 seconds per day. You’ll see that the lever is incredibly sensitive - if you narrow it to 30 sec fast and then push another 1mm you can easily overshoot to 30s/d slow. Try to as best you can to get writhin 10-15 sec. Then put the case back back on hand tight and wear for 10-15 min to let it settle in - then out on time grapher - keep repeating this process until you get it to +3-6 sec - you’ll find that it’s so sensitive you’ll almost never be able to “put it there” - you’ll have to hit that number through luck and trial and error. Once you get it there put the case back on again and check the time over the next few hours - if after 6 hours you’re still wishing a couple of seconds - just leave it alone - unless you’re really OCD like me and you keep working it until you’re within 3 s/d. It’s better to be a little fast than slow because it makes setting exact time super easy - if after 3 days your 15 sec fast - simply hack the second hand for 15 seconds.
Thats really it in a nut shell.
BTW - this pic is from one of my watches - google 4130 and compare it to gen. They’ve done a good job but the finish isn’t as good as gen - you’ll also see that the regulating and beat error arms (the scissor levers) are different on the gen and a fairly obvious instant giveaway. Never the less - this is a fantastic vertical clutch chrono movement!