Dynalco - SPD-100 (Model M104) referenced Signal-powered, 4-digit, unlighted display, intrinsically safe product produced by high technology. SPD-100 (Model M104) became irreplaceable of foundations. SPD-100 (Model M104) referenced product which is satisfy the customer's needs, offers advantages of quality and cost. It produced result of tests of laborotory for years. SPD-100 (Model M104) referenced product is an original piece of your foundation or machine, original parts makes your machine live longer.