Old thread , new comment .....maybe.... The add I attached is
The American Magazine
Volume 102
1926, is the blade pictured for the Darwin proprietary variant head ?
Here's a thread about an uncommon Darwin variant that takes proprietary blades:
Darwin comparison pics: Connie's Darwin Standard versus my "weirdo" Darwin - http://badgerandblade.com/vb/showthread.php/306886-Darwin-comparison-pics-Connie-s-Darwin-Standard-versus-my-quot-weirdo-quot-Darwin
And here are some photos from that thread:
I noticed that the very side notches on a regular DE blade make a tight fit with the "bar" on this Darwin cap, so a few snips from the blade:
was all it took to load a blade and shave with this one. The Deluxe has some pretty stiff competition here.