How old would you say this buckle is?

[Mud Hut]

Plain front - Based on what we can see on the back in the photos below, how old would you guess this buckle to be?

 

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[BosnMate]

How large is it? Can you read the writing on it? Is it silver or nickle silver? Just off hand I don't think it's really old, as in more that 50 or so years, but that's just a guess on my part.

 

[BosnMate]

I can't make anything out from the photo.

 

[Mud Hut]

It is a shade over 52.1 mm (a shade over 2 inches) long by 42.86mm wide (roughly 1 11/16 inches) and is marked STERLING om the back. That is all I can make out under the loop. Ghosts of other lettering is there, but can't make out what it says.

 

[BosnMate]

My pure guess would be post WWII.

 

[TheCannonballGuy]

That buckle's belt-attachment form is what I call a "bar-&-nearly-vertical-stud." The earliest example I know of it is on an early-1960s (Civil War Centennial) reproduction CSA belt buckle which is marked "Pat[ent] Applied For"... which indicates this belt-attachment form was invented and Patented in the early-1960s. See the photo below.