[Milsurplus] Designations

[Hole in the Head Press]

Is there a listing somewhere that identifies such things as....

/AP  /U  /GR  /URR /FG  /FR  /G  /PT  /UP

For example what is the difference between an R-390A  and an R-390A/URR?

Thanks.

-- 
Sam Stokes, Publisher, KG6WYZ
3rd Edition of Rings of Supersonic Steel
The Last Missile Site
Fort Baker Through the Years
http://www.holeintheheadpress.com

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