Help identifying vintage accordion "Parlando" (Made in Klingenthal, Germany)

[Exvy]

Hello! I have a vintage chromatic button accordion with the name Parlando on the front.

• Left: 5-row bass side (20 buttons)

• Right: 3-row keyboard (17 buttons per row + one extra row)

• One white register switch

• Serial number: 59/1418/678 (not sure if 6 or 8 at the end)

It looks like it might be made by Meinel & Herold or another Klingenthal-based company, possibly from 1940–1955.
Any help identifying the exact model, year, or maker would be appreciated!
Photos attached.
Thanks in advance!

[SIMON GABRIELOW]

I think you may be best trying an accordion website for more information...although I am sure someone on here maybe kind enough to give you more  hints🌝

[Theo]

It’s not a concertina it’s a chromatic button accordion.  Try asking on the https://www.accordionists.info