Suffix help

Looking to verify the suffix of a Citizen crystal.

CM200C-32.768KHZF- UT

Standard part does not have the U, I am thinking the U designates a reel size. ‘T’ indicates tape packaging.

So, my question is: What does the ‘U’ mean in the part number??

Welcome to the Digi-Key TechForum CH_anderson.
The U calls out RoHS compliance, and the T calls out the Tape & Reel packaging.

Ah, very good. Thank you for the quick response!