Happy Father's Day all.

Yesterday I was able to acquire a signed bottle of Baker's (along with a WTRR 101!) and besides being signed by Fred Noe there is one small discrepancy on the label. Where my other bottle of Baker's has the proof listed at 53.5% this one has it as 53 1/2%.

Is this an older label or a special label that he signs? Both are batch B-90-001 and are otherwise identical.