Resda 雷士达 was a Hefei Watch Factory brand. The name's translation is unknown, but it has been speculated that it may have been coined to be similar to the English translation of its main brand, Red Star, without being too revolutionary-sounding for export. This model's automatic movement is quite remarkable. The barrel bridge and click are very unusual, and an automatic winding mechanism that winds in only one direction is not seen often on a tongji. The code under the balance is AH above 2J2.