Buster Posey Game Used Bat Question

[CatcherSwag28]

I found this game used Posey LVS C243 bat and authentication letter listed on ebay. Can anyone substantiate the lack of date stamping on the knob? I have seen another Posey C243 bat listed in an AmericanMemorabilia.com auction with no visible date stamping and 28 handwritten on the knob, but there was no noted third party authentication. I have not been able to find any game used Posey C243 bats authenticated or photo matched without a date stamp on the knob.

Any info or photos would be appreciated. I am new to this site and very impressed with how helpful and knowledgeable everyone is. Thanks