Abstract: A low-cost watch band and case comprises a receptacle for receiving a watch module, switch protuberances integrally formed with the sidewall of the receptale for actuating function switches on the watch module, and a watch band integrally formed with the receptacle for attaching to the user's arm.

Abstract: A network of impedance elements comprising combinations of resistors and capacitors in which the impedance of the network is modified by the selective destruction of the individual elements of the network by electrical impulses. The selective destruction of the individual elements may be planned so as to result in any combination of shorting or opening thereof.In a specific application the frequency of the oscillator used in a digital watch is adjusted by the inclusion of a network of impedance elements, wherein the elements are then selectively destroyed in accordance with measurements of the oscillator frequency to improve the precision of oscillation. This selective destruction of elements may be done automatically by electrical means, resulting in less labor, greater speed and smaller size of the oscillator, all of which are extremely important in the manufacture of digital watches. The method also simplifies the production of digital watches.

Abstract: A new and improved shock-resistant electronic watch module is provided, which comprises a case, a frame of electrically insulating material mounted in the case, a lens plate of an electrically insulating material being flexibly mounted on a first side of the frame, a substrate mounted to the lens plate, a frequency standard, a frequency divider, an electro-optical display means, and means for driving the display, all being mounted to the substrate, and, a battery removably mounted on a second side of the frame and being electrically coupled to the substrate.