Help dating these plates.

[tcolgate]

Would anyone have any ideas on a date for these, or maybe a way of dating them? There's no expiry on the packaging. I think the label style is later. I'm assuming '60s or '70s. I'm not sure when they stopped making p300, or coating glass. The data sheet includes recipes for D61a, D-190, D-167, and F-53 and F54a fixers. They may have been packaged (or manufactured?) In London.
I have 3 boxes. The emulsion is surprisingly fine for a fast film. They are very fogged, but I'm still getting some fun results.
I can't find any old product catalogues with plates listed (I'm sure I did find one a few months back). Looking a various museum items with the similar styling, early 1960s seems likliest.

 

[tcolgate]

They could be earlier if the National Trust dating is accurate
Box of Kodak P.300 Rapid Panchromatic photographic plates. 1525333 | National Trust Collections https://share.google/XaeCcpxv7BacbIFQq

 

[Molli]

Maurice Fischer's 'Photo Memorabilia' is my go to source for dating papers and films. The closest match to your plates seems to be in the Kodak Sheet Film Section around 1965:

Kodak Black & White Papers

Kodak

photomemorabilia.co.uk

I have some 8x10 Kodak Photomechanical Film in my stash with the red boxed Kodak logo alongside the black boxed descriptor matching the style of your plates and it shows the faintest stamp reading 10 APR 1969.

The labels changed again in 1970. Mr. Fischer has very kindly and assidiously shown packaging from both England and the United States so, hopefully, you'll be able to form a more confident estimation of your plates' age.

 

[MattKing]

Assuming, of course, that that box hasn't been re-used........

 

[tcolgate]

Assuming, of course, that that box hasn't been re-used........

IIRC all three were fully sealed. Certainly two were

 

[tcolgate]

Kodak Black & White Papers

Kodak

photomemorabilia.co.uk

I have some 8x10 Kodak Photomechanical Film in my stash with the red boxed Kodak logo alongside the black boxed descriptor matching the style of your plates and it shows the faintest stamp reading 10 APR 1969.

The labels changed again in 1970. Mr. Fischer has very kindly and assidiously shown packaging from both England and the United States so, hopefully, you'll be able to form a more confident estimation of your plates' age.

Thanks! That's really useful. Of the 3 packs I have two designs. The one seen on the right here is dated Nov '62. One of the shots of a pack of sheet film that you linked to says that a style of packaging similar to the left hand pack was introduced in '65 (with another design for 1970). So 65-70;seems likely.
Thanks!

 

[Molli]

Thanks! That's really useful. Of the 3 packs I have two designs. The one seen on the right here is dated Nov '62. One of the shots of a pack of sheet film that you linked to says that a style of packaging similar to the left hand pack was introduced in '65 (with another design for 1970). So 65-70;seems likely.
Thanks!

You're welcome! I forgot to mention that I have some small (2¼”x2¼” and 2¼x3¼") Velox papers here of similar vintage. I've used them in a little Paterson Contact Printer and they're pretty much perfect.
I'm always happy to direct people to Mr. Fischer's site - it's an absolute treasure trove and he's both a scholar and a gentleman. I'm glad you found it helpful.

 

[tcolgate]

For the record, these plates are listed in the 1966 catalogue with a few useful details

https://www.photomemorabilia.co.uk/Colour_Darkroom/MFisher/Kodak_Professional_Catalogue_1966-67.pdf