Tissot Watch Heritage Porto Mechanical T1285051601200. Tissot Watch Heritage Porto Mechanical T1285051601200. The comprehensive amount of archives Tissot accumulated over the years, allows the brand to revisit models that testify to the exceptional know how of its watchmakers. This heritage watch is inspired by a watch from the 1910s and is defined as tonneau shaped, a timepiece with a special shape case resembling a barrel. Whereas its name Porto takes back from a previous limited edition, honoring the Portuguese city after being declared European capital of Culture in 2001.