The Early Walthers web site located here is dedicated to the early Walther pistols from the early 1900's with the model 1 patent being filed on August 07, 1909 though the model 9 that was in production in the WW2 era. The site collects data to better understand all of the variations of each model in includes a wealth of knowledge on models, variations and serial numbers. Some of the rare Walthers are also show including the model 6 that lost out to the Luger as the sidearm of choice for the German military in WW1.
The web site can be found at: http://earlywalthers.com/
“Cliff Dixon – I would like more info. about my model 4 sn 107062 if possible.” Cliff your Walther model 4 is a late second variant and was likely made about 1917 of 1918. It is one of the more common variants and about 250K were made that are like yours. More info: Early Walther Pistols – Model 4 (earlywalthers.com)
I would like more info. about my model 4 sn 107062 if possible.