49 gas tank filler neck, foreign object?

[Mad Mux]

Removed the gas tank for cleaning, pulled this out of the filler neck...I dont see anything like this in any schematics, is this a functional piece anybody ever seen, or a foreign object that some kid put down there 50 years ago?

 

[WABOOM]

My guess is it was put there to prevent siphon theft.

 

[flatheadmurre]

The tube is for wenting when filling up the tank...and the other part as stated to keep your gas safe from thiefs.

 

[aussie merc]

anti siphon they come in all manner of shapes and sizes

 

[Mad Mux]

Figured it might be something like that, thanks folks. Could it be a Ford part, or more likely aftermarket?

 

[aussie merc]

more than likely after market if it ford old henry would have put a number or name on it somewhere