The Reference 7750 marks the genesis of the Chronograph One story — the first black-coated chronograph ever produced and the original embodiment of Porsche Design's "form follows function" creed. It featured a flat crystal, a very fitting large tachymeter, and was configured with 30-minute and 12-hour counters, a central and small seconds hand, as well as a quick-set day and date mechanisms.

As its name suggests, the reference was powered by the Valjoux 7750 movement. Unveiled in 1973 as Valjoux's late entry into the automatic chronograph race, the 7750 quickly became one of the most enduring calibers in Swiss watchmaking. Although the Porsche Design Chronograph One was officially launched in 1972, the first production pieces reached customers by 1973. Despite its early success, the Valjoux 7750 movement production was abruptly halted just two years later amid the Quartz Crisis, which devastated mechanical watch manufacturing.

The 7177 encompassed the widest range of issued models ever associated with Orfina and Porsche Design. The 7177 was available for retail purchase over the counter as well as issued directly through military organizations, as evidenced by the multiple military variants. However, these watches are often considered quasi-issued as multiple variations were made available to the public.

The 7177 military variants were identical to the civilian 7176 variant, including the case, except in five main ways — Available Finishes, Caseback Engravings, Central Chronograph-Minutes Hand and Hour Chronograph Hands, Rehaut, and Dial. Produced from the late 1970s through 1991 when Porsche Design ended its partnership with Orfina, the 7176 and 7177 spanned the longest of any Orfina Porsche Design reference.