Vlave Wrenches 617 sold on Ebay appear to be new Manufacture not welded.

[Diesel911]

300d w123 diesel 617 240d valve adjustment wrenches

Mercedes Diesel Valve Adjustment Wrench Set


Fit's 240 and 300d 617 engines.
-Precision Made in the U.S.A.
-3/16 thick Stainless Steel
-Works Great
-Nests Perfectly

Don't know if these are bent Bicycle Wrenches or purposly made Wrenches.
Hazet Wrench head thickness is real close to 1/4 Inch; so at 3/16" thick the Ebay Sellers wrenches are thinner yet.
Handles seem a little shorter than the Hazet set.