This Tudor Big Block Ref. 94300 is an iconic chronograph from the late 1970s to early 1980s, recognized for being Tudor’s first automatic chronograph. Powered by the Valjoux 7750 movement, it features a robust and reliable self-winding mechanism with a quick-set date function. The watch boasts a thick 40mm stainless steel case, earning it the "Big Block" nickname due to its increased thickness to accommodate the automatic rotor. The classic black dial with contrasting silver subdials ensures excellent legibility, with a 12-hour counter at 6 o’clock, running seconds at 9 o’clock, and a 30-minute counter at 12 o’clock. A tachymeter scale is engraved on the fixed stainless steel bezel, enhancing its sporty appeal. This reference 94300, in excellent condition, showcases Tudor's renowned craftsmanship and enduring style, making it a prized piece for collectors and enthusiasts alike.