Head TGK 307.12 - Translation Please

[tennisplayer3275]

I recently cracked one of my Head Graphene Touch Radical MP rackets. Rather than throw it out I decided to part it out. Took off the butt cap and pallets (only one successfully) for future use. Once I got under the pallets there was a sticker with TGK 307.12. I have several Head Pro Stocks (TGK 238.1/.2/.5) but have never seen a two digit number after the decimal. This was a purchase off an auction site and came to me as an unused stick that had all appearances of a retail stick. I was a little surprised to see the TGK code on the hairpin. Anyone know what the TGK 307.12 means?

 

[esgee48]

Ask this question here:
https://tt.tennis-warehouse.com/index.php?threads/head-codes-updated-list.449606/
TGK 307.1 just means it is a Graphene Radical MP 18x20. It is my understanding that the xxx.xn indicates flex characteristics with the n.

 

[vladanzvo]

TGK 307.12 is Head Graphene Touch Radical 25 MP Limited Edition (25 Years)