Looking at how close the indexs are it would not surprise me that the beat was out also, if you have a local watch smith with vibrograph or similar he should not charge much for a quick look at how it is running and regulation, Gioarmany has done a couple of tutorials on regulation and the theory is the same for just about every movement, but i recommend
a. live with it
b. get it checked out and regulated by a watch smith
c. learn a bit on some cheep watches and then and only then work on your best ones.