Hi Chaplin37,
If it's not what Jim suggests and your escapement looks really good and free then It's quite possible that you're losing power somewhere in the train. I remember your watch being a 7 jewel model. These watches do tend to wear easily as they lack train jewels and do often need bushings inserted. It's really important that the pivots and holes are super clean. I'm pretty sure that's not your problem as I know you've already checked that many times but thought I would mention it here for others that may have this problem in the future. Try removing the balance and test the pallet lever action. The pallet should "jump" back and forth between banking pins when unlocked by using a tiny brass pin or even a bristle from a brush. If the action is sluggish then your problem lies either with the train or mainspring or both. If sluggish then remove the pallets (let down power first) and then wind the watch a few turns to get the train turning. Watch the escape wheel to see what it does when it stops. A healthy power transfer throughout the train will usually cause the escape wheel to stop when all power is dissipated and then "reverse" it's direction, spinning backwards a few turns. If it does this then it's good in that position. You'll want to wind it enough so that the inertia of the train over runs the mainspring power a bit at the end so that the spring will give some "back power" (I have no idea what the correct terminology for this back power is
). Then try it in different positions. Should be consistent in all positions.
After these tests please let us know what you find out Chaplin37!
Bob