My 2021 T100s (4-48) only had the serial number on the 4 iron as well.

My 2021 T100s(4-48) also only have the serial number on the 4 iron. I’ve inspected the clubs in detail and couldn’t find any hints of them being counterfeit. Can someone from Titleist give us any details about the 4 iron serial numbers please?

Same here just checking to see if anybody got any more info on this?I also ordered a t200 set and the serial number is on 6iron.

Just coming back to this old thread as I’ve recently purchased a new set of 2021 t100s irons and only have the serial number on the 4 iron, the last set of titleist irons I purchased through an authorised dealer and had serial numbers on all. Did anyone get more info on this?

I bought individual T100S Irons for my youngest son. 8,9, PW and AW. Each one has its own serial number.

Hi, I want to change my shaft on my 704 CB , very old club but wonderful. I need to know the tip size ! Can you help me ?

I was custom fit through an authorized dealer earlier this year and none of the heads have a serial number. 2021 T100 4-pw. I’ll ask next time I’m at the shop.

I bought 2021 T200 model (5-P) today. I cant find any serial numbers even on 6. Can you guys confirm? If there is serial number on 4 iron, i understand. I didnt buy 4 iron. Thanks

Kind of depends on where you got them and if you ordered them as a standard set of individually made up as a specialty set. If you bought them second hand, it is possible that someone kept the 4 iron and they were part of a standard 4-PW set. In that case, they have kept the one that had the serial number. If you ordered from Titleist and say, ordered 6 through 9 only, each one would be stamped. If you got them through some overseas website and got an incredible price, could be another reason you are not seeing a serial number. Not that good counterfeiters don't fake the serial numbers because we know that they do.