That's a grand old thing. It has a most unusual bridge, the likes of which I've not seen before, so I saved a pic of it for future reference (though I've sworn black & blue I'm
not making any more planes!). If Mr. Tissington made any more planes like that they would be easily recognised.
The rear handle is pretty standard for a British infill, but the front bun is unique in my experience, and along with that bridge makes it a really interesting find.
The side profile is similar to one used by several makers. Was Spiers the first to use it? The earliest plane I've seen with that side profile was a Spiers, but I have no idea if he was the originator. The screws retaining the stuffing is also a sign of early manufacture, along with the wedge as already pointed out.
I assume sides are dovetailed to the sole? I blew the side pic up as much as I could but can't see any clear evidence of dovetails. I have seen faint lines on a few oldies, but on most of those old planes the quality of the dovetailing is beyond reproach.
A bit of cleaning should give it back some dignity....
Ian
Edit: It looks like
that bridge design was his trademark, alright. The smoother in this case looks like it has a cast body, so maybe the panel plane above is cast too? Cast bodies were used right through the infill era (Spiers very first infill had a cast body, in fact), so it doesn't help with ageing...