Board Thread:Speculation House/@comment-174.255.201.0-20170507034806/@comment-26397825-20170507045539

Something like that. But we know that extensive study of aura can make you 'more than a man' (with Ozpins silhouette helpfully shown on screen when this is said) and that 'time is a thing' when it comes to Ozpin's abilities, so I don't think it's that much of a stretch for him to have slowed his aging or just gotten long-lived somehow.