Trovato dal vecchio libro degli ospiti dei miei nonni dalla Finlandia. Qualcuno può aiutarmi a tradurre questo?

“A heartfelt thank you for your hospitality and the interesting tour. Best wishes for good luck in the future after the joint victory.

[Sorry, cant decipher the name]

Reichs[mitvorstand?], Berlin”

Thank you for the hospitality and the interesting Tour (i guess a Museum or estate Tour?) with best wishes for a healthy Future after our (Axis) Victory

I’ll give it a try.

In German first:

Herzlichen Dank für die herzliche Gastfreundschaft und die interessante Führung. Mit Wünschen für eine glückliche Zukunft nach dem gemeinsamen Sieg. Lieselotte Kusmann – Gatow, Reichshauptstadt Berlin

Thank you for the lovely hospitality and the interesting tour. With best wishes for a happy future after the common (better: united) victory. Lieselotte Kusmann, Gatow 

Gatow is a small village in Spandau, home to an airbase at the time. That airbase would later be vital to Berlins supply to the blockade, used by the British forces, now it houses the German Air Force museum and the HQ of the Luftwaffe. 

Edit: might not be Reichshauptstadt, but Reichsnährstand:

https://en.wikipedia.org/wiki/Reichsn%C3%A4hrstand?wprov=sfti1

EDIT2: u/arf_arf1 correctly identified the two words I missed. It made so much sense in hindsight.

Herzlichen Dank für die herzliche Gastfreundschaft und die interessante Führung. Mit besten Wünschen für eine glückliche Zukunft nach dem gemeinsamen Sieg. Liselotte ??? + Gerhard ???, Berlin

Sincere thanks for your kind hospitality and the interesting tour. With best wishes for a happy future after our collective victory. Liselotte ??? and Gerhard ???, Berlin

This is dates 20th July 1944, so just weeks before the signing of the Moscow Armistice and the Lapland War.

EDIT: On second thoughts, that doesn’t look like Lieselotte something and Gerhard something; either Lieselotte signed in full and added Gerhard’s name, or it’s a hyphenated surname like Lieselotte ???-Gerhard; the next word seems to be “Reichsnährstand”, a government organisation that regulated food production. The next entry is Annemarie Jahn from Königsberg (now Kaliningrad) in Prussia, also from the Reichsnährstand. It makes more sense that this was a fact-finding delegation rather than a couple on vacation during the war.