Need help dating a jacket

[a6skin9]

I was wondering if anyone could help me in trying to figure out how old this jacket is. I've owned it for about ten years and just rediscovered it in storage. There is only the one tag (pictured) present on the garment. Thanks for any help.

 

[clevispin]

1958-1962

m

 

[Patrick Hall]

I'd guess early 60's as well.