Sharp GF-800 in 1980s has many functions, and its movement structure is still stable. At that time, there were factories in China that used Japanese-made parts for Sharp OEM, that is, domestic assembly (the nameplate on the back was assembled in China), which was different from Japanese-made parts (the nameplate was made in China), that is, the place of origin was different. In fact, the internal technology and structure are the same, and the quality is not much different. They are all genuine, which is equivalent to what Foxconn does now.

However, there are many knockoffs, some of which are almost imitations of 1: 1, and even the stickers on the back are marked as made in Japan or embedded in China, claiming that they were assembled in China. However, the movement and internal structure are far from those of Sharp 800 in Zhengchang. See an article here to teach you to tell the difference.

A shell color, the real Sharp 800 has only two colors, one is extremely light gray, which is what we call white, and the other is iron gray, which looks like black, which is what we call black shell, but it is actually gray. The pure black Sharp 800 is not produced by the factory.

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The second magnetic head, Sharp 800 of Zhengchang, uses a high wear-resistant magnetic head with a protrusion of 0.5 mm in the middle, which is obviously different from ordinary magnetic heads.

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The hook of the third warehouse door, the hook of Sharp 800 warehouse door in the factory is in the middle position above the warehouse door.

Hook. The file extension of encoded image stored in jpeg file exchange format.

Four AC power sockets. The AC power sockets of Sharp 800 are all square sockets, and the inside and outside are covered with 1 10V 220V conversion covers.

Power socket. The file extension of encoded image stored in jpeg file exchange format.

If the above four points are different, it can be determined as the cottage product of that year.