Leach was as close as I could see, adjustable guide, but it's marked and looks to be a brass guide also.
More searching along that name might work? I was thinking the "winged" screws might give it away? but the Leach does not show the same screws. For some reason my 4th pic did not turn out. It shows holes / indentations along the bottom. I'll take another pic later today 1am now.