XEM7310MT - Opal Kelly,JT 37×7/RMIc RMI 0/128/256 – JTAG,7T59-F010] The world's first ever 1/100th of a second Chronograph. Made in 1992 and costing $2,200 on release! It's ugly but I love it : r/Seiko,Citizen Chronograph 8100A 67-9577 Challenge Timer – Vintage Citizen Watches,*MKS* fd-7 pedal (black)