I picked up a few saws earlier this week. Upon cleaning them, I was very pleased to find one is a Groves and sons. It has come up very nicely with only a light clean with autosol on the plate and 0000 grade wire wool on the handle. It has a stamp that is a bit different from those in BS&SM and it has a star clearly stamped on it which I can find no parallel for. The style of lettering has similarities to the 1830's and 1840's stamps in the book so I'm dating it between those time brackets. The plate is straight with all its teeth and is nice and tight in the handle. It's Graduated from 4 TPI to 3 TPI and cuts very nicely now I've sharpened it, so I may keep it as a user for any big ripping jobs that come up I'd be pleased to hear your views on my guessed date or the significance of the star.