Need info about crown graphic with top mounted rangefinder.

4 months ago i acquired a beautiful crown graphic 4x5 camera with a top mounted rangefinder for 300 dollars, the camera is fully functional and takes great photographs! it also has a graflite flash with 7 inch reflector, my question is, what type of bulb does the top mounted rangelite take? I know it’s an e10 miniature base. But I’m having trouble finding the correct size and voltage bulb. I’ve found a 2.1v bulb but the filament is not the correct shape, (it’s an upside down “U” whereas It requires a “straight” filament with minimal bend in it) any help would be appreciated!

 

graflex.org has some information, but perhaps more usefully a link to Cress Photographic (at flashbulbs.com) which seems to still exist.

You need this- http://www.southbristolviews.com/pics/Graphic/manual-pdf/TRFService.pdf

 

The lamp is listed as a GE #14 in the parts list. That's a 2.47V, 0.300A, 0.5 MSCP bulb with a 15 hour life and a C-2R filament (I think means unsupported bow). I don't know if you can find one with a straight filament, but maybe just a gentle curve (bow). That should still work as AFAICT there's no requirement that the filament be straight. You can still line up a curve. They seem to be priced all over the place.

That's a 2.47V, 0.300A, 0.5 MSCP bulb with a 15 hour life and a C-2R filament (I think means unsupported bow).

That sounds like a common 3v flashlight bulb to me.

But if you shine a cheap laser pointer into the eyepiece of any double-image rangefinder, it turns it into a coincident light-dot rangefinder.