Typed postcard signed ("H. Geiger").
Tübingen, 7 Nov. 1929.
Oblong 8vo. 1 page. With typed address.
€ 1,800.00
To "Mech. Master Sellmeyer, Munich, Institute for Theoretical Physics at the University": "Please let me know which atom models can be bought from you and at what price [...]".
Slightly spotty.