As much as I find this amusing, I do not think bottle collectors are going to reach deeply into their wallet to pay a premium for it.
Yes, there is interest in the bottle community for mold variants - quite a bit actually in recent years - but I am not aware of cases where a single letter like this makes for a big value difference. Color variants and substantial mold differences are where the interest lies.
Having said that, would I be surprised if I saw an eBay auction where a letter variant like this went crazy price wise? Not in the least. Still I think it unlikely...
