The bike has a few minor signs of wear. It belonged to my late father-in-law, who always treated his belongings sensibly and with care.
The tires will probably need to be replaced next, but you can still ride quite a few kilometers on them. Otherwise, everything is fine!

Frame size: 54 cm from the center of the bottom bracket to the top edge of the seat tube,
49 cm from the center of the bottom bracket to the center of the top tube
Top tube length: 53.5 cm
When I measure "horizontally" from the center of the head tube to the center of the seat post, it is 55-56 cm.
The head tube measures 19 c...