Factory Colt 1911 9MM barrel twist rate?

Hello,

While perusing the Rock River arms hut at Camp Perry, I picked up a Colt 1911 style 9MM barrel. No idea about provenance, but for $45, I thought I'd find a use for it. Any ideas what twist rate Colt uses for their 9MM barrels?

Thanks,
Chase

My list shows 1:16 or 1:18 3/4 (newer) depending on the age.

I’ve always thought 1:16 for 1911.
Jon

Thanks fellows. I thought it might look a little faster than 1:16, so it's time to get out the slide rule and actually measure it.

It's amazing how "straight" 1:32 barrels look (got a KKM one, also from the bargain bin). Was the 1:32 thing originally for the M9 and then migrated to 1911 barrels, or ?

Thanks!
Chase