70mm back for 4x5 Graflok

[Edward Meyers <aghalide@xxxxxxxxx>]

I have this 70mm back that fits into a 4x5 Graflok back
camera. Size of the image is 65 x 80 mm. It's called a
Beattie-Coleman Transet. It's all metal with a rapid wind
lever on top. Frame counter goes to 52 frames. When I open it
up the part attached to the camera stays attached. The inner
part comes off showing two "open"reels inside. The reels come
out (have only these two, but have gotten others which I believe
could be filed slightly to fit). Problem is the reel holes, which
are square instead of rounded. In the corner of the square 
there's a light cutout. The item is beautifully made and has
two large rubber rollers to bring the film to the polished
pressure plate and over it to the take-up reel.
Does anyone know about this device? It seems like it should be 
loaded in the dark.
I'd like to know whether it's worth keeping or selling to 
someone who would use it. Ed Meyers

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