The gun was made in 1959
A 9.9 hp Mariner outboard, serial number OC269812, would be a 1990 year model.
1969
Browning.com has sn data under customer service.
You would need to provide a model number along with the serial number to get a answer to your question.
No way to tell.
In order to determine the year model for a Evinrude, or Johnson outboard, the engine model number is used.
your 1911 was made by colt in 1914. if you think it's a springfield because your slide is marker springfield that is incorrect. the serial number is what denotes the maker
L engine
400 or so
100-300
@ 1972
Link to mercury outboards serial #s, 9.9 hp to 30 hp. http://www.themarinedoctor.com/cgi-bin/YaBB.pl?board=MM;action=display;num=1137539563