I can't properly express how much I like this watch, which it has astonished me for keeping exceptionally accurate time (+45' per week), even before being serviced. I am confident that it will be regulated to even better standards.
Cutting to the chase:
Brand: LeCoultre, between 1955-1958, in a monoblock 14K gold case. The 35mm case is engraved "Cased and Timed in USA by LeCoultre"
The movement is a hammer automatic, commonly called bumper, in this case is the 17j p812 which is not so well documented. It was the second bumper movement from JLC and it beats at a rare 19.800A/h. The bumper movement which was eventually abandoned for the full rotor, makes a worrying noise in the case, like if something is loose in the movement, and it can be felt bumping on the spring.
When I bought it, the dial showed some deep stains which in the beginning felt like dial scratches. However, patience with (several) slightly wet cotton bud, strength and dedication left a clean dial. The crystal which was also scratched got like new with just toothpaste and a polishing cloth, by hand.
And here it is in my wrist, where I proudly put it in the mornings on the way to work.
It is just a great watch. Its historic value, accuracy and chronologic milestone of a bumper, makes it even more lovable to me. I will take good care of it.