Vintage constellation -- suddenly wildly off time

[northland0]

I've owned my 70's pie-pan constellation for close to 4 years now, and while I've noticed that it has started to lose time a little more than at the beginning (now at losing ~30s / day) -- it never really bothered me.

Then I woke up on Saturday with the time significantly ahead the accurate hour, and over the course of weekend determined it is now running +2hrs/day.

This is a wildly significant departure (and in the wrong direction) -- and wondering if anyone has guidance on:
1. Any NYC-based watch repair locations (have brought to Central Watch in the past, but open to other recommendations).
2. What could have caused this, and approximate cost [which #1 will actually be able to answer, but welcome guesses]

[northland0]

Also appears to have accelerated overnight from +7seconds / minute to +9seconds / minute, despite getting towards end of power reserve

Read elsewhere that it has likely become magnetized -- so will just bring to a local shop to get it degaussed

[AEC]

It's magnetized. Central Watch can probably take care of that while you wait.

[janice&fred]

Originally Posted by northland0

Also appears to have accelerated overnight from +7seconds / minute to +9seconds / minute, despite getting towards end of power reserve

Read elsewhere that it has likely become magnetized -- so will just bring to a local shop to get it degaussed

either that or some oil got stuck to the hair spring. whatever it is would be related to the balance and not a big deal to straighten out as it's basically right in front of the tech's eyes once the back is unscrewed.