Pre-owned – Good. Monroe (Litton Business Systems) Model 98 handheld calculator, 1976, serial F168045, made in Japan. 8-digit green VFD (vacuum fluorescent) display. Basic functions plus memory (CM/RM/M-/M+), x², square root, 1/x, and percent. Runs on 4 AA batteries (6V DC). Cream/taupe case. TESTED AND WORKING with fresh batteries (seller confirmed).