I assume you are talking about the so called classic Tennessee rifle with simple forged iron strap guards,banana boxes and clean functional lines. These guns were made by a number of upper East Tennessee gunsmiths.The origin of the banana box is conjectural but probably derives from South West Virginia rifles.One of the earliest,if not the earliest,banana boxes is on a gun I once owned which was made by a Virginia trained gunsmith who moved into Tennessee about 1784. This particular gun was made about 1810 and he died in either 1810 or 1814. He made an earlier gun with a two piece iron box derived from a school of late 18th-early 19th century Virginia guns.The so called "Bean" rifles are typical of upper East Tennessee guns made by a number of gunsmiths such as the Gross family,the Bulls,Jason Harris, Ambrose Lawing ,and others.It is very difficult to determine the makers of unsigned guns other than by architecture and individual details although many such details were shared by several makers.I once owned a fine upper East Tennessee gun which had almost ALL the so called Bean details but wasn't signed and I now believe the maker to have been Jason Harris of Unicoi County, Tennessee which was carved out of Washington County,home of several of the Bean gunsmiths including the best known,Baxter Bean.I have long thought that many gunsmiths including the Beans bought their iron furniture from local blacksmiths which may explain the uniformity of iron furniture particularly the guards,boxes and butt pieces.
The earliest known Bean, to build guns was George Bean who was also a goldsmith and silversmith as well as a gunsmith and who advertised in a 1792 Knoxville paper of his work in all three areas.He also was a founder in 1798, along with his nephew William Bean the younger, of Bean Station in Grainger County,Tennessee.Unfortunately no signed example of any of his work including guns has been located.His nephew,Baxter son of Russell Bean was born Ca.1790 and could have been at work by 1810. Baxter's brothers,Charles the elder and Robert Bean were probably at work about the same time and were contemporaries of Baxter.
I don't recall ever seing a signed and dated upper East Tennessee rifle but have seen several fake "Beans" In my opinion the guns we think of and consider "Bean type" or better still,"classic upper East Tennessee rifles"date from about the second decade of the 19th century.I am sure there were 18th century guns made in East Tennessee and I owned one made about 1790 and have seen a few more but you asked about the classic East Tennessee or Bean type rifles and I would be extremely hard pressed to recall one of these type rifles made before Ca. 1820-25.Incidentally I have NEVER seen a Tennessee rifle with a Germanic{Siler} lock.Baxter Bean seems to favored Ketland locks and othe makers used both English as well as American locks.of the 19th century.I hope this helps you.
Tom Patton :imo: