can anyone help? this is from a bauhaus publication from 1926. is there a similar font?
thanks for your help!

OldStyle  Suggested by marapara 
Tiina  Suggested by Heron2001 

'Un vieux Bookman disparu'

You may want to have a look at Linotype's Baskerville Classico and Caslon Classico. No match of course, just look at the g and the S (which looks like a Clearface), but with a similar ß.
Can't give you a sample as Myfonts is down (again).

Old Style doesn't have the ß and Umlauts.

En allemand : Antiqua - Antiqua No 1,2,.... or xxx Antiqua
En anglais: Old Style - xxx Old Style, yyy Old Style

thank you for your help! OldStyle is pretty close!

As usual - I'm late to the party - but if I had to duplicate this I'd use something like Tilna
http://www.fontshop.com/search/?q=Tiina&sample_text=AgeWKsc

Which as the ß and Umlauts.

That Jackie is a wrong ß. Crossbar at the left.

The same style as missing

http://cjoint.com/14oc/DJkdfnoZWgd_enveloppe.jpg

This could be - somewhat - restored wit the Century Oldstyle or, even better, Berthold's Century Original BQ. But these do not have a matching ß for the original post.

On a toutes les caractères sauf le ß.

http://cjoint.com/14oc/DJkqaThA0te_what3.png

As the ß is in the sample it should be in the set ... right?