Alas, my Farrow does not have an original buttplate (long story). Hopefully, Terry Buffum will tell us if that looks to be an original. My thought is that the casting is too thin, that there was a lot more metal in a Farrow. The checkering does not look at all like the original checkering on my Farrow. Also, no cheek piece. I thought Farrow put a cheek piece on all the single shots.
I've owned only one original Farrow and it had been rebarreled at some time, but its buttplate was very similar if not identical to the one shown. Same with the stock styling, checkering, grip's bottom S-curve, no cheekpiece, etc. Not saying the features were exactly identical but they were very similar. Possibly the builder had seen a Farrow or some other similar rifle and copied it. Since each Farrow was built as a one-off, it's very possible that the styling and features varied and even evolved somewhat over the years. My Farrow appeared to be an earlier one, it had the C-shaped mainspring.
Regards, Joe