This is a standard Rapid Rectilinear lens for 5x7", perhaps full plate.
Verichrome is an extremely good lister of his collection and what he says is absolutely correct.
A. Laverne was a buy-up and sell type of organisation (a bit like B & J in the USA). Many French companies had problems at this time and Laverne was living on their remnants!
Panortho..... is just a meaningless product name, which phenomomen was popular in the US, too.
All these lenses have serial numbers around 100,000.
PS. Lens Vade Mecum is a good source for things like this!
Thanks Steven. I never meant to imply that the Ebay dealer is anything less than knowledgeable. I just didn't know how to interpret what he wrote! Panorthoscopic -- that's the word that got me. Thanks for clearing things up and looks like I'll have to pickup a PDF copy of Lens Vade Mecum.
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