50x microscope --> photogelatin printing technique = authentic vintage lobby 
card. 

50x microscope --> inkjet or laser printing technique = fake vintage lobby 
card. 

Is this not the case? 

If so, then authenticating lobbies is easy; heck, you can send them to me and 
I'll do it for you. Photogelatin printing is very distinctive on the 
microscopic level, as I've mentioned previously. 

If not, please enlighten us and explain why not. For example, I would be 
surprised to hear that someone has present day access to this obsolete printing 
technology. 

Randy 


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