Left to right: Topcon 35S, Topcon 35L with serenium light meter and Topcon35 JL.

Topcon 35JL has the stopped down version of the lens otherwise
identical to that of the Topcon 35L. It was made to sell at a lower price.

Later Topcon 35L had a van Albada type view finder with the inside of
the bright frame transparent like that of Nikon S2.
Common Topcon 35L (and Topcon 35S) had half-mirror plated full surface.

Here's the instruction booklet for the TOPCON 35S
Caution: it's heavy