Flying Club Sign

[Phil Perry]

 

 

[facthunter]

Instructions are too complex to be understood.. 3 holes could also confuse. Nev

 

 

[IBob]

Indeed, and nowhere..........NOWHERE.......does it warn against the risk of placing fingers over the holes while viewing!!!

 

 

[onetrack]

But .. but .. if the wind blows the card away, you no longer have any method of measuring the weather!! 

 

 

[KRviator]

Personally, I like this one more: