For Her, straight out of the 60's Madmen era this demure little peignoir by Montreal Frenchmaid Co.
Or this sexy night coat by Argentine company Mordisco, Ropa Intima
Sweet!
And for Him,
This very classy Retro Citizen Quartz analog wristwatch water resistant to 50m.
Or
If he's a photographer perhaps a nice vintage camera that has looks and is usable.
Happy Valentines!