OK, I have the Ritchie compass. I do recall years ago having a problem (before LEDs), opening it up, verifying it was wired correctly, taking it to West Marine, seeing they had the same ones, and then trying it on a battery there, reversing the leads, seeing it worked, and just saying screw it and installed it backwards cuz it worked that way. Do not remember the number or type. I do believe I have a Globemaster SP-5. My current bulb is white, but the green might be nice as it would match my Raymarine instruments. Stu might have a point (trying hard to not agree with him

).