Abstract: A is particularly useful in a specialized activity, such as piloting an airplane, in which a user's forearm is held vertical and with the radial aspect or "edge" of the wrist oriented toward the user's eyes. The mount is for use with a timepiece or other instrument that has a legible face and controls, with the controls preferably above and below the legible face. The mount includes a relatively rigid, standard-size casing that fits loosely on the radial aspect of the wrist, held by a wristband. Along opposite edges of the casing are inward-directed retaining flanges. A relatively compliant insert pad is secured in the casing, between the flanges. The pad is custom fitted, and preferably individually custom-molded, to conform closely to the radial aspect of a particular individual user's wrist. The casing carries the timepiece or other device on the radial aspect of the wrist, with vertical elements of the legible face parallel to the long dimension of the forearm.