This is not a 9777 but a ref. CK 2242, also known as "Techron" which was used by the RCAF. It has the "interesting" 18 jewels movement.
The number 9777 was scratched by hand, maybe by a watchmaker during service, and the watch did not come this way from the factory...
The watch looks original in all its parts and has nice hands 馃憤