Hello Ian:I noticed your thread regarding various plate holders and I would like to add this item.The ground glass back for my Goerz "Mystery Camera" is as follows:the lip is 3 mm, the length (from top to bottom) is 144 mm, the width (from outer edge to outer edge) is 108 mm and it is 3 mm thick.Any ideas as to what holders will fit ?.

Thanks,

Doug