The only thing "wrong" with this machine is there is a broken spring for the tension, I think that is what was told to me (not the bobbin). The Visnova accessory/tool can is still with it as is the owners manual. The motor on the machine is a Lincoln Model 55, and on the bottom MF1738 is stamped.
Beautiful Colors with red Chinese mark that appears to be Da Qing Qianlong Nian Zhi . Does anyone know anything about this? Thank you. There appears to be a very small red "m" written in the upper right hand inside corner on the back.