This is an Eterna Sonic with stainless steel case in a very slim design, date at 4. The movement is an Eterna 1550 (ETA 9162 ), signed front: ”ETERNA, Sonic, Electronic”, back: ”Water Resistant, Stainless Steel, 5783169” inside: ” ETERNA WATCH Co, 1550, Unadjusted, 12 Jewels”. Black velvet-like band. Bought as NOS in 2001
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