That's an anniversary model (or earlier--my lore doesn't go back that far and I can't remember when Graphic boards changed from a 4x4 plate-style board like this one to the thin shell style used on later Pacemakers), and as Dan says the lens dates from 1945.
I would want to check to make sure the solenoid isn't preventing the necessary movement of the shutter release by being too tight or something. If you are not going to use a flash, you could simply remove this solenoid and the linkage to the shutter, and then tape over the holes. (Also, tape over that hole on the board at lower left in the picture--that will leak light.)
The button at the top is the press-focus button. When the shutter is cocked, that button should open the shutter.
Also, the flash synchronizer is currently engaged. If you are not going to use a flash, slide that around to "off".
Rick "who'd try these things before coming to further conclusions" Denney
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