I like Shanghai 1120s. A lot.
Shanghai Watch Factory produced 1120 models in the late 1960s. This is a typical 1120, except the indices are different from others I’m accustomed to seeing.
I put it on an old nylon mesh strap.
The date code on the 18,000 bph SS1 is DB (February 1969).
Less than a decade later, Shanghai Watch Factory was producing hundreds of thousands of 7120 models. I like this example’s textured dial.
I put it on an old Shanghai leather strap.
The date code on the SS7 is DH (August 1977).