IWC Cal

[Kommis]

This is my favorite IWC Cal 8531. Mid sixties i think

 

[ulackfocus]

Nice looking watch. 👍 Does that caliber hack?

 

[Kommis]

U ulackfocus

Nice looking watch. 👍 Does that caliber hack?

What do you mean with hack?

 

[ulackfocus]

Kommis

What do you mean with hack?

When you pull the crown while the watch is running the second hand stops.