I think we’ll have a chronograph week 🙂 The first one is model number 67-9577 from October 1972, which was the year these watches were launched. This one is powered by the 28,800bph 8100A 23 jewel movement, with single sub-register for counting minutes. The second hand counts the seconds of course, and it’s nice that these chronographs are better left running most of the time since that causes less wear then when the chronograph is stopped. With a black coated light alloy case and polished steel bezel, this one has an easy to read black dial with orange chrono hands and a minute/second track around the circumference. The baton hour markers are lumed at their outer ends and the main hands are also lumed. The black day and date wheels blend well with the rest of the watch, whilst the multi-coloured sub-dial brightens the look, and helps to read the passage of time as it is shows 5 minute sections. The original bracelet is a nice addition on this one, although the leather parts of it were beyond hope, so they have been replaced: