Vintage Ilford HP3 Glass Plates Exposed With A 4" Step Wedge

Well this is an unusual piece of photo history in the form of Vintage Ilford HP3 Glass Plates Exposed With A 4" Step Wedge.

In their original box and packaging, the sensitometric plates are in fair cosmetic condition, albeit pretty dusty. I'm not sure how visible the latent images are after all these years but still a nice 1960s collectible from the ILFORD Research Labs for your vintage photography collection! 

The box also contains a 4 x 1" glass wedge and some calibration charts on graph paper.

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