Bishops sleeve model (Img) :: esquema patrón manga

Possibly would work for witch sleeves if you didn't cinch the end and left it open.

or flared short sleeve or tulip sleeve are good options for recently acquired vintage top

Sleeves #1

Fabric Manipulation for fashion design - decorative sleeve structures; couture sewing techniques by winifred

Sleeve Patterns(袖子纸样设计实例) 2 - 招财锋 - 招财锋的博客

Link no longer works but illustration shows you how to alter a standard sleeve pattern to create a darted sleeve head.