I've searched so long to find out. Now I discoverd this site.
Does anyone know the font name of the numbers 43? I've read on this forum already the font style of the name: Sarah Script.

Square 721 Bold Extended  Suggérée par pilaster 

Looks to me like some kind of Eurogrammamicrosquarestile. See here:
http://www.dafont.com/forum/read/74778/metropolitan-logo
…but I'm only on my second cup of coffee, so I could be wrong.

I think you're right! Thank you so much!!!! Only the 4 looks a little bit different in Square...