A661, 662, although never formally put into production

A661, A662 as the "Cultural Revolution" broke out just when the new models developed by the factory, the new "board road" movement, with the original 581 series of completely different movement.

 

Similarly, the reasons for the Cultural Revolution, chaos inside the factory, engineers, technicians were "struggle" or transfer, and some went to wash the toilet, and some went to the assembly to "learn", the two models have only very small quantities of the system prototype, not for mass production.

 

Mainly found in the present 581 series 662 movement with SS1 series of "balance wheel" shock the system, the same stocks in order to digest, "662" cover test marketing "paid" products.

 

A661, compared with the female models except A657 prototype models of the watch list, 661 produced a prototype of the product, then the female form of this model with a bottom in the market have not been found.

 

A661, 662, although never formally put into production, but the actual table late SS2 and SS3 models male models female form movement with reference to the two models evolved.