It's going to be in a random place on the firearm. Most of the time, it isn't noticeable.

Blemishes are typically hard to find.

Good evening to you!! Blemishes can be anything from minor finish marks to machine marks that are barely visible. Most blemishes are hard to find and are never the same on each firearm. Hope this helps. Have a good rest of your day.
🇺🇸🇺🇸 'Merica' 🇺🇸🇺🇸

Some of these Blemish models have something that one may not even notice? A small rub mark, a fine scratch, who knows until it arrives.

Hi Frank and welcome. Most of these blems are tiny imperfections in the metal finish. These could be small spots of discoloration or dullness spots. According to reviews from other vendor websites, some owners are unable to find the blemish. Cheers, stay safe and enjoy!

Could be anywhere. Colt is not sending out easily seen blemishes. Some folks say it takes very careful looking to find it.

Hi Frank, there is no way to know the particular blemish on this specific gun. They are cosmetic imperfections. These products are in like-new condition with very minor blemishes. Most are barely noticeable, and many report the blemish cannot be seen unless thoroughly examined. This unit is no longer under warranty for anything cosmetic related.
Stay safe & have a great day!