This is an original Coleman vent.
It is a low vent style.
Based on bail hole and color, this dates after 1963

There are two different low vents. One has rectangle slots in the vent, and the other has a "half circle" hole design. They are different sizes. Please look at pictures closely and make sure what you need.
This vent has the rectangle hole pattern. 

THIS IS NOT:
A "re-porcelain" item. People spend big bucks to take old vents and have them restored with new porcelain.
A "enamel paint" item. May be good for a never-to-be-used shelf queen. But paint will fail over time if used.
A cheap reproduction.

This is an original Coleman part.  

Please see the pictures for overall condition. 

Shipping is USPS with tracking.
If you have any questions, please just ask.

Thank you for looking.