Anyone remember this 1960s spy/adventure movie?

All I can recall is the first few scenes in which the protagonist arrives in Stockholm, I think, and checks in at the Thomas Cook counter or something.

Sorry, no more details than that. Anyone have a clue?

Very early on in the piece, Harry Palmer flies into Helsinki in Billion Dollar Brain.

Did it have mention of some watch repair shop with a name something like Kromadecka?

Wow! A spy arrives in Stockholm, I think, and checks in at the Thomas Cook counter or something…

I’ve gotta see that, too!

Seriously, this reminds me of some of the British B&W TV episodes I loved as a kid.
Spent years looking for them (before the internet, it was slow going), and when i found them…
Not so hot.

Don’t know if it’s Billion Dollar Brain.