Tianjin brand watches were a product of Tianjin Watch Factory, but this one might not be. Other than the print and logo on the dial, everything else appears to have originated at a different factory, the Tianjin Clock and Watch Factory. The dial is similar to Tianjin 'J' dials, except it has a letter 'B' instead of the 'J', and 'Fangzhen' is spelled correctly. Also the textured stripes resemble some Yingchun watches, a TC&WF brand. The blank caseback doesn't have the grooves for the wrench used on ST5 watches, and the movement code, ZTZA, is that of Tianjin Clock and Watch Factory.