Around 1947 Graflex came out with the Type 5 holder. It was longer than the type 3* so you could grab the body of the holder to remove it rather than a dark slide. Type 4 holders were the same length as type 5s but were all wood, while the Type 5s had a metal band and light trap.

While never named such, I assume the shorter film holders were type 3s and these were stamped along the side "Graphic Press film holder" or "Graphic Plate Holder"

Here's the question:
Has anybody seen a Type 5 PLATE holder?