AND Apollo GF-A [GF-603A] Multi-Functional Precision Balance with External Calibration, 620g x 0.001g - 128mm x 128mm. The A&D Weighing GF-603A Apollo Precision Balance, 620g x 0.001g is robust and durable. The GF603A features Compact Super Hybrid Sensor(C-SHS) that makes the scale compact, fast, and precise. The GF603A includes a wide range of modes to meet workflow needs.