I have a couple of Inland letter openers. I don't know their time frame.
I just noticed that they are a bit different. One seems to have what you might call a waddle in the plastic below the head. The other has the logo filled in with blue.
Just seems strange they would make something so simple, different.
https://www.milsurps.com/images/impo..._zps0aca-1.jpghttps://www.milsurps.com/images/impo..._zpse18f-1.jpg