Sapphire is an Omega series.

Comrade: The information you provided is not enough to identify the authenticity of this form.

Sapphire: It means sapphire, which means this watch is a sapphire crystal mirror.

Stainless steel back: it means stainless steel back.

Waterproof: This means waterproof.

No: 8 193L is just a number with little meaning.

Omega's case number is eight digits, usually engraved on the back of the watch, at 6 o'clock below the back of the watch or at 5 o'clock on the ear of the watch. The case number can correspond to the watch warranty card.

The model will not be engraved on the watch, but the first eight digits on the insurance card are the model.

Omega series dials are basically engraved with: Constellation: Constellation.

hippocampus japonicus

Speed Master: Motorized Altman

DeVille: Dish flying, these are the four most common series.

Since I bought it in Hong Kong, I'd better take it to the nearest Omega after-sales service office for identification.