Thank you all for the information. Follow up question...
Are the silver bantams bred down from the silver LF or are the not related in anyway?
Related for sure.
I pulled out my old black notebook from way back. The notes aren't great, but they sometimes fill in where my memory lacks. On one page I have a heading SILVERS (BANTAM)/LARGE, so it gives a few details of trying to create LF silvers starting in 1988. I used some of those results the next year when trying to create bantam silvers. In 1989 I started on bantams with some of my own crosses and eggs from Jerry that year.
1989
Silver duckwing Amer. bantams
1/2 white/ 1/2 silver Old Eng. cock x silver O.E. hen, white Amer. hen & 1/2 white Amer/ 1/2 silver O.E. hen.
Between these crosses & the chicks Hatched from J. Segler's eggs, I saved the best 2 pullets & 2 cockerels.
The silvers from Jerry were "Tweeners" as Jeanne Treat would call them...medium sized birds somewhere in-between bantam and LF or oversized bantams. I used them in my breeding for both sizes with outcrosses and crossbreeding. I also used O.E. Game to reduce the size of the bantams and I crossed in LF Old English with my LF silver Ameraucanas.
1990
Silver bantams (medium sized hen) 2 cocks switched weekly.
Saved the old silver hen & one nice looking young hen.
My notes for 1991 don't mention bantam silvers, but under LARGE I have:
Silver, 2 medium sized hens x white cock, also x large B.B. red O.E. (Mark's), kept 1 B.B. hen 1/2 O.E. & 1/2 silver AM.
For 1992 my notes don't mention LF silvers. As I go thru these I see "medium sized" used a lot in the early years for me and some of the same birds were used in both breeding projects. Even though bantam and LF silvers share common ancestry they appear to not be the same genetically for the silver color/variety. At least with my lines of each the cockerels of each size go thru different feather patterns (phenotype) as they molt and mature.
The influence of Old English Game still shows today. I see that back in 1994 my breeding pen for bantam silvers had "4 medium sized hens x bantam black cocks". I probably didn't have a decent silver cock to use, but also the outcross probably helped get a little better Ameraucana type.