MM70, anyone who thinks they know what A HAWKEN looks like just hasn't seen enough of them. I was at Jim Gordon's Glorieta, NM museum in August and looked at a couple dozen originals, as well as at the Davis Gun Museum in Claremore, OK and The Museum of the Fur Trade at Chadron, NE. Here are some of Jim's: (don't bother to Google him, he is not into computers- but do a search on here for "Great Gunmakers for the Early West" by Jim Gordon.
I have Jim's three-book set, and just looked at photos of 35 original Hawkens in his book, Volume III, Western U.S. The first fullstock has the Pennsylvania style brass trigger guard, butt plate and side plate. (This rifle is in the Buffalo Bill Historical Center at Cody, WY). Can't tell if the rear tang is screwed or pinned thru a tab. One is soldered onto the rear TG (I guess). This rifle, also in the BBHC, has a brass spurred TG with the rear loop bent back, up and forward to be flat to the TG. It also has a brass BP, Patch box, sideplate washer, key escutcheons, and the nose cap also looks brass. Stamped S. Hawken, St. Louis. (That ought to blow a few Hawken experts out of the water.)
As best as I can see the photos, 20 rifles have the rear TG loop screwed to the plate, including Tom Tobin's, Kit Carson's and Jim Bridger's rifles.
On 7 I can't tell, including Liver Eating Johnson's rifle. One is a pistol grip (with a tang peep sight- there go a few more experts!) Five are sporting rifles, and there anything goes.
There is one thing every single one of the Hawkens have, except for the Pistol Grip and one of the Sporting Rifles with a pinned rear trigger guard tab, and that is that the rear trigger plate (or trigger guard sporting rifles) has a wood screw holding the plate or guard. Even the looped and soldered (?) rifle at the BBHC.
If the front trigger guard doesn't have a stud to fit up into the trigger plate (but most do, most of them are threaded, but I had a couple that were not threaded, had to cut my own threads), you can do one of three things: solder it on (I have not seen this), or drill a hole from the plate down into the guard bow and tap that and fit a 10x32 countersunk flathead bolt from the top down, or solder a 1/4 x 28 or 10x32 or whatever bolt stub on top of the bow and screw it up into the trigger plate. I like to time the threads so when I screw the TG into the plate, it just comes up tight and aligned. I in no way think I am a Hawken expert, but like to pass on what facts I can.