Different Background's Colors on Manhattan project Certificates

[francesco-5th]

Hello everyone, a question about the 2 different "background logo of Manhattan Project Certificate".

I have two certificates of the Manhattan Project, given to two different people, both civilians, one from Westinghouse Company and another from a U.S. University.

One background has the "logo" Manhattan Project - A Bomb, in gray Color and the other in light brown color.

The photos on the Internet about these certificates, show the two types of "background".

Anyone can tell me what's the difference between these two backgrounds?

 

Thanks.

 

[francesco-5th]

Anyone has an idea?

[BILL THE PATCH]

Any pictures?

[francesco-5th]

Grey background:

 

 

[francesco-5th]

Light Brown background:

[francesco-5th]

one "little"....idea?

[kriegsmodell]

These are the award certificates issued with The Manhattan Project Service Pin. The background "logo" is actually a depiction of the service pin's design. The pin was awarded in two grades; Bronze and Silver. The Silver pin was presented to those with one year or more service to the project. The Bronze pin was given to those participants with less than one year of project service. The award certificate's background device depicts the appropriate grade of the pin as presented to the recipient. Accounting for fading and age, the "gray" background version was presented with the silver award while the "light brown" was for the bronze pin. Hope this helps ....