Yep, absolutely private engraving. 

Thanks for that additional information, 3338thqmtruckco!

Back on the curved blade topic, this one also appears to be curved, but it wasn't. This one was purchased at his USNA graduation by a future WW2 Navy Cross recipient. 

Here are photos of two more that I currently own. I don't know of the date of the top "deluxe" model, but the bottom one was the one purchased in 1920. 

I think curvature of the blade can be attributed (at least in some cases) to an optical illusion. Looking back on photos of swords I owned, I surprised myself by finding that some of these swords did appear to have curved blades.........but they really didn't (I've never owned one with a curved blade; I've likewise never owned a mid-19th century one either).  For example, here's a sword that appears to have a curved blade, based solely on this photo: But, in this next photo of it, it's as straight as an arrow (which is correct):

Thank you for telling what the last is ribbon is.

Regarding the curved blade...this is actually the first time I've read about curved blades used in the 20th century. I always believed this to be a 19th century thing, along with a wider blade.   I will say, for a data point, I own a sword that was purchased in 1920 by a medical doctor Captain (O-6). I used this as a personal sword during my career as well. It has a straight blade - no curve at all. So....? 

It’s a cool jacket… most guys will say it’s cool… most won’t know about Foss… or if they do, they’ll assume a tribute jacket… the guys were just letting you know about the details and age..    saddle soap will be fine on this hide..   wear it good health… it’s a nice G1

Hi Mikie, thanks for that info.  I'll send you a PM, I'd love to connect with that person as well if possible.  I might just have to build another wall hanger to go with my M1 /m14 hybird.  

An interesting short film on the airfield. RAF Silloth was the setting for the Tyrene Power / Betty Grable film  A Yank in the RAF in 1941.