Help Defining "Type 1 " Photo ; is this one ?

[horzverti]

This is a Type 1 photo. The back is dated...twice. Once in the slug and once in the stamp. The ink handwriting also includes a third date, but I wouldn't consider this as a factor to determine type because this could have been added later.

It was also cropped from the original neg. You can see some writing in the upper left edge. That writing was probably wax pen on the orig neg. Most photos are cropped at least a bit.

Mike, you can feel confident that this is an original, Type 1 photo.

[Exhibitman]

Great point, Dave. Original negs were valuable; the owners did not want to degrade them by using them to make hundreds of prints, so they routinely created copies and used them. That's why I've always paid the most attention to the markings and slugs, which are hard to fake convincingly, and silvering on certain types of photos (which is nearly impossible to fake). I suppose we'll see some forged stamps and slugs eventually for extremely valuable photos but at least up to now it hasn't been cost-effective to do so.