Browning A5 barrel date

[Clay]

It’s a Belgian barrel with St. Louis MO and Montreal . When did Browning barrels start having Montreal on the barrel? Thanks in advance

 

[bigjohn]

Any numbers on it?

 

[Clay]

No numbers. But I think I figured it out. There is an H before the serial number which makes it from the 50s. So Montreal makes sense.
Before factoring in the H I thought maybe from the 30s and maybe a replacement barrel. Thanks for answering.

 

[DanOh]

I have contacted Browning with help on gun questions but don't know if they can help with barrel questions.