Original bridge for 1937 Gibson EM-150?

Am I right in thinking that the bridge on this 1937 EM-150 at Retrofret is original? Rosewood, larger thumbwheels?

https://retrofret.com/product.asp?ProductID=7010

I've looked up 3 or 4 of these online and they all have different bridges. I just got one in that has a Loar-style bridge (ebony, smaller thumbwheels), but the saddle doesn't have cutouts on the bottom for the thumbwheels. So I don't think it is original. The saddle happens to be cracked, but if I have to replace it it's not as though I am losing an original part, correct? (See photo.)

I don't think that is an original bridge, replace it and save whats on it for whoever gets it down the road. I think a lot of the Gibson's in that time period had the large wheels and rosewood bridge as was pictured in the retrofit link.

That was mine in the RetroFret listing. As far as I know everything was original except for the pick guard. I eventually did sell mine along with my other "Charlie Christian" instruments: side string and their guitars.

Pretty sure I have a Cumberland Acoustics Loar-style bridge sitting about that will make a good replacement.

This EM-150 was sold by T.R. Crandall a year ago.