First of all, your closet bend has to match the drain pipe size, not the toilet. The flange has to match the closet bend. The top of the flange is the same size for all. Your toilet is a 14" rough-in. The fact that your flange measures an extra 5/8" just means the toilet will sit 5/8" further out into the room and have that much extra space behind the tank. Toilet come in standard rough-in sizes of 10", 12", and 14". Only a few models choices are available in 10" and 14" because 12" is the basic standard rough-in. Toto makes an adapter for a few of their models that permits these toilet to install and any of the 3 rough-in sizes, but these adapters only work on these specific models. My question to you is why in God's name are you installing an 85 year old toilet. This is most likely a 7 gallon per flush monster with obsolete repair parts. I note by the number of posts you have made that you have been around this forum for a long time and surely should know there are far better choices for toilets that are not expensive and will perform well on 1.28 or 1.6 gpf. If you were restoring a vintage automobile, I might understand why you needed vintage parts, but toilets are another matter. Maybe I'm missing something???