Rick, I went and checked my other early rifles,1895 and 1899 ,and i had a 1895 with a flat steel shotgun style buttstock,and an early 1899f saddle ring carbine with the flat steel type shotgun butt. my first rifle with the standard style hard rubber buttplate is the 54.000 one but thats the thick one.The first normal hard rubber buttplate is on a early 1899H. Is it possible that the SRA 303 buttplate was the only early hard rubber buttplate until 1904-1905? Don