Thank you my friend!Based on the patent info for the Cowan, my guess is early 20s. There are a few different models. Everything that I know about them is in this thread (which includes pics of my other two):
The Cowan
The Cowan
Hey folks! I took possession of this weirdo today. I haven't found a post on B&B about it, so sharing it here in SE where it belongs! If any of you have experience with this razor, I would love to hear about it. Here is the patent info for The Cowan Hair Trimmer and Safety Razor. It's a single...r.tapatalk.com
The Weck Surgical Prep is 30s-ish.