The A. Schild 1670 is a manual wind mechanical watch movement that features a bimetallic screw balance. It was manufactured around 1935 and includes sub seconds. The movement's specific differences from other Felsa movements, such as the 71, 73, 75-80, 144, 166, 167, 203, 205, 216, 219, 240, 244, 255, 268, 286, 287, and 326, are not publicly known.
The A. Schild 1670 features the following functions: