Chimney identification

[marty319]

Have a chimney that is around 25 years old,how do I identify if it is selkirk or gsw as no stickers on it,will there be something stamped on the chimney?

 

[begreen]

Sometimes it is stamped on the chimney. Otherwise it can be hard to id and may be discontinued.

 

[marty319]

Thank you

Here is photo

 

[marty319]

Took it out and stamped gsw on the inside