This is a "Code 3" diecast model bus produced by Matchbox International Ltd circa 1980s/90s and made in China; numbered MB17, it's a Leyland Titan "London Bus" in red & white with special "1st Rear Engined Running Day" & "BaMMOT Wythall 31/08/98" stickers added between decks.
It's in excellent pre-owned condition with minimal signs of handling as new (please check all images); it comes in its original box.