Quote Originally Posted by Antenna60 View Post
So may I assume the Durham Duplex used disposable blades? This is how I interpret "Enduringly Keen" and "Saving Stropping." Such quaint language.
The Durham Duplex used a double-edged blade so that it could be used with either hand. The blades (which are still available) could be honed and stropped with the use of an attachment that set the proper angle for the sharpening process. So, while they were replaceable, the were also re-usable and could be used many times before being discarded.

Regards - Walt