That model at first sight looks like an successor for the LB, but with external CdS-cell instead of Selenium and the meter display now within the finder. However it lacks an easy accessible battery cover.
This, the fact that there was no LB successor, the early winder design, and that it is designated "L" makes it seemingly the "arch" model L prototype.
A version that never made it, nor do I know of it hinted at anywhere.
I like the product description !!! Praktica L Prototype used condition , all working , not tested with film , condition look at pictrues. PAYMENT BANK TRANSFER ONLY. NOT ACCEPT PAYPAL.
I think this sums it up very well ( my bold highlight)
There is a saying " a fool and his money are easily parted".