I understand and have seen this before myself. I have asked the guys at true temper to see but you know they come straight to you from True Temper in Sarasota. I honestly think they get in a hurry when screen printing the shafts and they get rubbed or some letters look larger because they are pulling the silk screen off as they turn the shafts. There ae also two places in the US these are made and it could be the larger font size of on factory and slightly smaller size of second factory. I will see what they say.;
True temper factory says it is because they are suing two different machines to print the part codes on the busts of the shafts.
True Temperの工場によると、シャフトの胸部に印刷するパートコード用の機械が2種類あるからだそうです。