Rare 9N Serial Number & ID Tag

I recently received an email from my old friend, mentor, and Ford 8N Tractor innovator extraordinaire Marvin Baumann. I have never seen anything like this before. The "GP" prefix could likely be in reference to the Ford GPW vehicle (JEEP) but why designate a 9N with it? I don't have any more details and am arranging to go see this in person and take numerous photos.

Marvin writes:

Tim
I ran across this all original 9-N today {GP8923 serial number) in excellent condition that a friend just purchased. Evidently it may have been government owned with the Fort Knox tag {Attached to block} on it. I did not understand the “GP” designation on the serial number for a standard tractor, Marv.

-Tim Daley(MI)

Follow Ups:

• Re: Rare 9N Serial Number & ID Tag - SelectOSpeed 07:25:36 10/24/17 (1)
  • Re: Rare 9N Serial Number & ID Tag - John in Mich 18:46:48 11/10/17 (0)
• Re: Rare 9N Serial Number & ID Tag - Bruce Dorsi 08:14:05 10/23/17 (1)
  • Re: Rare 9N Serial Number & ID Tag - Tim Daley(MI) 05:36:41 10/24/17 (0)

Name   : 
E-Mail : 
Subject: 

Message:

To add a single image to your post,  click here.
To add multiple images to your post, click here.

Optional Link URL : ←http://www.yourwebsite.com
Link Title        : ←Website Title
Optional Image URL: ←http://www.myimages.com/mypic.jpg

Enter image characters into the text box.

Press Preview Message button below to proofread message & check if images and/or links are shown before posting message. Press browser's back button if correction is needed. Press Post Message button on Preview Message page to finalized your post. Thanks!