Or rather they seem to be called letterbox plates these days.
I like the original brass one here - but didn't like having to polish it. Lacquer is a temporary fix - but looks dreadful when worn/damaged and even more work to remove polish and re-lacquer.
Polished chrome I didn't want.
So decided the most maintenance free that I liked the look of would be brushed stainless steel. Not SS lookalike, but the real McCoy. Something not that easy to find, after checking the usual sources.
Eventually found what I wanted at a specialist online supplier. And all the other matching door furniture. Not cheap - but was willing to pay for quality.
It all looked very good when it arrived.
Was surprised there was no fitting template with the letter plate. Four fixings one at each corner with what looked like SS rivenuts (but welded to the plate) and threaded rods - SS cap nuts for the interior.
Drew out a template and got on with it - the opening was larger than the original.
Only to discover the rods wouldn't screw into their captive 'nuts'. Assembling it off the door showed just why - they all pointed in different directions, none was square. Not wanting huge holes with washers in the door, I decided to complain. No problem they said (after I sent some pics) we'll replace it and send you a return label for the old.
The replacement arrived today. Did a trial fit of the rods and they are reasonably square.
But the fixings are 15mm in from the sides. The old one, 10mm. Otherwise identical. Guess there's a reason they didn't supply a template.
Watch this space. ;-)