Need Help Researching Vintage Omega

Please help...

I bought an old watch at a yard sale for the Speidel type band on it. This is my father's favorite type band and he is always wanting them. When I bought it I never even looked at the watch face. After presenting it to my dad, only to find out that the band had too many links removed in the past, I actually looked at the watch. I noticed it was an older Omega. I am trying to find out some information on this watch but I am having no luck. There is a wealth of knowledge here so I'm hoping you guys can help.

On the dial it says, "Omega Automatic Seamaster Deville". The dial is black with gold hour and minute hands and a center post mounted "red" second hand (aftermarket ?). No numerals, just gold indicators of which the indicators at 12, 3, 6 and 9 are slightly larger and of a different shape. There is no date function. On the screw down case back it says, "Swiss Made, Waterproof, Steel Back, Bezel 10 Microns of 18Kt on base metal." There is no Omega symbol or horse. The watch is gold in color. Inside information is as follows: 22193220, Cal. 550, 17 Jewels, Adjusted 2 Positions." The crown is somewhat scuffed from the years as is the case.

I am wanting to know the details of this watch. Specifically, If it is genuine? Date manufactured? (1965 is my best guess). Is second hand an aftermarket addition? And an approximate value in it's current state as well as refurbished. I have found nothing online. No images of this exact watch. Omega vintage watch page yielded no findings. I can add pictures if I can figure out how. Also, I only paid five dollars for this watch.

Any help would be greatly appreciated.o|:-s