Go Back   CMP Forums > CMP Sales > CMP 1911
Register FAQ Members List Calendar Mark Forums Read

Reply
 
Thread Tools Display Modes
  #21  
Old 04-11-2019, 08:14 AM
cplnorton cplnorton is offline
 
Join Date: Nov 2011
Location: Van Wert, Ohio
Posts: 2,072
Default

The OB markings have been observed and known for at least 15 years ever since Jeremy Cheek wrote his article. But they have only been found on the M14's heels like the 0-6X program until this M1911 release.

All available evidence points to Overhauled Barstow and then the year, is the meaning of the mark.

The thought is Barstow switched to marking them OB instead of just the standard O right around 1970+/-, to denote which facility they were rebuilt at.
Reply With Quote
  #22  
Old 04-11-2019, 09:59 AM
TW56 TW56 is offline
 
Join Date: May 2010
Location: Minnesota
Posts: 2,158
Default

From the initial CMP 1911 pistol release, an electro pencil OB 79 with a M-B stamp near the "Ordnance Wheel" stamp. A thank you to cplnorton for his ongoing research regarding USMC small arms.






TW56
A family members early black hard case pistol which is NOT for sale.
Reply With Quote
  #23  
Old 05-05-2019, 11:23 PM
RJT128 RJT128 is offline
 
Join Date: Feb 2010
Posts: 7
Default

My CMP pistol (R 244181X) came with the MB stamp on the frame, slide and barrel:


Frame and slide: in the sunlight, you can see that it is an MB on both.


The barrel stamp is harder to read.

The frame is also electropenciled OB83. It seems most of the images I've been able to track down of the MB (or M-B) stamps have been on pistols with an "O" electro pencil mark on them.

There was another poster who said they had a MB stamped 1911 (M-B slide, MB on frame, marked OB84) as well; links were posted in the picture thread.

In researching what I got from the CMP, this MB stamp is the only thing that has me puzzled...
Reply With Quote
  #24  
Old 05-10-2019, 11:56 PM
TDP0311 TDP0311 is offline
 
Join Date: Nov 2013
Location: NW Ohio
Posts: 1,108
Default

Just a thought, perhaps the M could denote some sort of magnetic test and the B stand for Barstow?
Reply With Quote
  #25  
Old 05-11-2019, 08:19 AM
TW56 TW56 is offline
 
Join Date: May 2010
Location: Minnesota
Posts: 2,158
Default

Quote:
Originally Posted by TDP0311 View Post
Just a thought, perhaps the M could denote some sort of magnetic test and the B stand for Barstow?
__________________
Feedback thread;
http://forums.thecmp.org/showthread....highlight=TW56
Reply With Quote
  #26  
Old 02-13-2020, 08:06 PM
Strait Strait is offline
 
Join Date: May 2010
Posts: 25
Default

[QUOTE=TW56;1823700]From the initial CMP 1911 pistol release, an electro pencil OB 79 with a M-B stamp near the "Ordnance Wheel" stamp. A thank you to cplnorton for his ongoing research regarding USMC small arms.


What does the "N" on the upper-forward trigger guard signify? My RR has an "M"
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 12:00 AM.