This is a beautifully conserved vintage IWC with handwinding caliber 89 and a rosegold case which is slightly oversize for the time.  I did not measure exactly, but it looks close to 36mm, maybe 35.5mm.  Rarely do you see them in this original and excellent condition.  The dial is flawless, but not redone.It is a perfect “Sunday” watch, isn’t it?  Elegant, classy, yet understated.  And it can be worn be a lady or a guy.  Either way, a wonderful piece from the 1960s.