I've been looking for a long time for these Brazilian examples, ever since our dear friend Luiz Paracampo told me about the story of BelOMO Zenits having bottom covers replaced with ones that say Made in Zona Franca De Manaus, Brazil, in order to escape some importation fees. Finally found a few good examples and even a Brazilian manual! So far the only ones I have found with such replaced bottoms are 12Pro and 12XSL, I did not see any others.. I wonder what other models have this.
There were at least five ZENIT SLR cameras that were made by SEAGULL in China. Perhaps there were others. From what I've been able to determine, the target market was mainly South America -- especially the Brazil & Argentina area. You can see what I have at: