The Vintage Wrist Watch Company has dated this piece to the 1930s.
In fact the Unicorn, Marconi and Rolco were advertised by Rolex as "An accurate timekeeper at a moderate price".

This particular watch has a hand-winding movement, signed Rolex Geneve underneath the dial, and it is working nicely.
The watch measures 22.5mm wide excluding the winding crown and 30mm high excluding the lugs. The case is signed Rolex SA inside the case back. The case is in good condition with just light surface marks.

The lens is in good condition.
The signed dial is showing signs of its age although still very easy to read the time. The infill has come out of the hands.
A later black leather strap has been fitted.
PRICE INCLUDES WORLDWIDE POSTAGE
The Vintage Wrist Watch Company has dated this piece to the 1930s.
Specialists in antique and vintage wrist watches and pocket watches
You can view the stock and full dealer information on the The Vintage Wrist Watch Company Profile Page