... today, i went to visit to my watchmaker and asked him to repair one of my watches. as usual, asked him any interesting watch he have, then he showed me this Tissot Seastar Chronograph powered with Lemania Cal.1277. he opened the caseback of the watch and i found the movement is in amazingly good condition, the timer is functioning flawless. and most interesting thing to me is that i found the movement looks very familiar with Omega chronograph Cal. 321. the only difference i can think of is that Cal.321 has 3 registers, but this Cal.1277 has only 2 registers and also both of them were made in different years. the reason why these movements look so similar could be because Omega Cal.321 was actually also made by Lemania, it would be not surprised to see their similarity and maybe in fact they shared the same design. i did some search from the internet, but did not find much info for this Lemania Cal.1277. sure not sure anyone out there can tell me more details of these two movements? by the way, i bought this Tissot Seastar which is my second chronograph watch after my Omega Speedmaster Cal. 861. I post this thread in this Omega forum because this Tissot watch has shared the same blood with most of other Omega vintages, think it may be appropriate to share my second chronograph with my friends in this forum here. hope you also like this watch! stefan