hugo meyer model number 4 rangefinder question not 4c

<p>Guys<br>

I bought a hugo meyer model number 4 rangefinder from an anniversary 4x5 speed graphic from e bay<br>

to use on a camera project.<br>

I have read that the model number 4c version is for 127mm on 4x5, <br>

but what focal length is the model number 4 for on 4x5.<br>

There is no stamped focal length on the rangefinder,<br>

could it be for a 135mm lens on 4x5.<br>

regards Andrew</p>

<p>I found on https://graflex.org/helpboard/ posts stating both the 4C and 4PG to be used on cameras with a 127mm lens. Another post list a #5 as for a 150mm lens.<br>

I at one time had an Anniversary Speed with a 4C Hugo Meyer and was able to adjust it to a 135mm marked lens that had an actual focal length of approximately 132mm. The adjustments were at their extremes.</p>