Type A-11 Navigation (Hack) Watch, No. 10616 manufactured to Specification No. 94-27834-B by the Waltham Watch Company, Waltham, Massachusetts.
The type A-11 navigation (hack) watch (see figure 1), consists of a waterproof, chromium plated brass case with one piece center and bezel, fitted with a round unbreakable crystal, stainless steel threaded back and waterproof winding crown, containing a 6/9-size, 16-jewel grade center second movement.
On a latter mode (see figure 2), the waterproof case has been substituted with a dustproof, three piece type consisting of a chromium plated brass center and threaded bezel, fitted with a round unbreakable crystal, stainless threaded back and waterproof winding crown.
A waterproof wrist strap is attached to the case by means of removable spring bars.
The hands, numerals and graduations are painted white, and the dial has a durable dull black surface. The dial is graduated into 12 hours, corresponding with one revolution of the hour hand. One revolution of the minute hand equals one-hour, and one revolution of the center second hand equals one minute.
The winding of the watch is accomplished by rotating the winding crown in a clockwise direction. It should be fully … Continue reading...