GG markings on Busch Model D

[Bill_1856]

I've had three 4x5 Busch Pressman Model D cameras. All have had 3.25x4.25 rectangle marked on the 4x5 ground glass with red paint (I'm sure it's a factory job). They all have plain spring backs. I can't imagine why the GG is marked. Any ideas?

[David F. Stein]

That format fits the standard newspaper 2-column width, I believe. That was one of the reasons the 3-1/2x4-1/2 format was also prevalent-the neg could be contact printed. The photographer could get the important content within that frame; there might have even been 4x5 film holders set up for the smaller format. I've opened many a vintage film holder to find it adapted inside for a smaller format.

[Juergen Sattler]

Just another great example why I am always amazed by the knowledge of the folks on this forum. I would have never thought that the column wdith of the newspaper drove the GG markings. I had to laugh when I read your answer - thanks for sharing.