All About Pocket Knives

Guys,
I have a recently acquired knife and it is stamped what looks to be Morton Bros USA. It is a very worn stamp and I have to exprapolate a little to come up with the stamping so a picture will be of no help on this one.
I can't find anything on it in any of my books. I can find the Sheffield listings but this one shows USA. Any help on dates, etc would be appreciated.
What the heck! I'll post a photo of this badly worn, but rare old office knife, anyway! I like to think of it as a knife with character .
Ray

NOTE corrected photo

hey ray, could it be morley bros.? sorry, don't know what letters you can actually make out. i'll keep lookin.

Johnnie,
I reposted the photo and I even got the correct one posted this time. There is just no way to get anything off the tang.