Okay guys, I think I might have found a good match. Here is a pic of the tests that I did:The top right is the original.
The bottom right is the Stampabilities Orange Pigment Ink from Hobby Lobby. An okay match, but it's a little light, fades when it dries and turns to powder so it rubs off really easy. Not good!
The middle is Model Master International Orange (FS12197) Acrylic paint. In the picture it looks too glossy, but after I took the pic I rubbed my thumb over it and it dulled down exactly like the original. I found the paint at the local Dicsount Hobby Warehouse.
The one on the left is the Speedball Scarlet Red ink from Michael's. Waaay too red!
Tips on application...I tried to "paint" some ink on the stamp, but it was too thick and filled in the details on the "S" and the "A". Then I tried one of those sponge paintbrushes from the hardware store. Put a little paint/ink on the sponge and spread it thin with a toothpick or something....thinner is better. Lightly tap the stamp on the ink/paint soaked sponge and voila! Don't press too hard or you'll get the hard line with the paint squished out to the sides like in the middle picture...like the paint, a lighter touch is better. Anyway, I hope this helps.
Anyone else find a close match?
1944 AUTOCAR M15A1 (M16A1) HALF-TRACK:
(Being restored to an M3A1 configuration)
SERIAL NUMBER M-15 A 1, 1356
MODEL M-16 A 1, ORD. SERIAL NUMBER 1106
MVPA # 30507