Identifying some older notch codes

[ntenny]

I'm going through a batch of old family photos, and I've encountered some 5x7 sheets with notch codes I can't identify after digging through a lot of online sources. The main question is "are they nitrate?", but it would be sort of interesting to know the actual film stocks.

Dates are probably mainly 1930s-1960s with some outliers, so they cover a long period when both nitrate and safety bases were available. The photographer favoured Kodak and Ansco films from what I've been able to identify. All are black and white negatives.

The four notch codes that account for most of the unknowns are attached. These images are crops from the scans, and I tried to adjust them for visibility of the notches
1. One triangle, "Eastman-Kodak", and a sheet number.
2. Square, triangle, small gap, double triangle, sheet number.
3. Three triangles with small gaps in between, "Eastman-Kodak", sheet number. The gaps are too wide for Tri-X, I think.
4. Two "sawtooth" notches with a gap in between, no markings.

#1 could be Verichrome or Super Pan Press B, and I'm not sure if the edge markings help to confirm that. Some of the images might be too old for those stocks, and maybe it's an early stock with a generic notch that doesn't code for the specific film?
#2 is mysterious to me; it's a complex code that surely identifies a specific film stock, but I haven't found it in any reference so far.
#3 looks like the notches for Pan Matrix, but no one would use that pictorially.

I know about the square/triangle coding for safety/nitrate films at Kodak until 1949, but with no date information that doesn't help very much. Does anyone recognize any of these?

Thanks in advance
-NT

 

[AnselMortensen]

Hopefully this will help

 

[Kino]

Looks like:

1. Kodak Super Panchro-Press, Type B.
2. Kodak Commercial Matte Film.
3. ????
4. ???? Looks like some form of copy film, the notches are not typical, or it could be DuPont, Agfa, etc...

A couple of old edge notch charts:

 

[ntenny]

#2 doesn’t look quite like Commercial Matte to me, because there’s a gap between the square notch and the first triangle. It seems like it would be a weird pictorial stock, too, though it’s always possible that I have some copy negatives.

When was SPP-B introduced? I’ve got one or two images with that notch that I think are pre-1930, too early for Verichrome but I don’t know about SPP-B.

-NT

Late edit: I found this thread:

Kodak Super Panchro-Press, Type B

I've loaded up some 4x5 sheets of this to shoot tomorrow, and just glanced at the data sheet that was in the box. Even though the film expired in 1945, it's claiming a daylight speed of 500. For a 1940's emulsion, that seems awfully high to me. Can it be true?

www.photrio.com

—with a photo of a 1940s SPP-B box, and the notch code shown on the box is my #2. So that likely resolves that one.