Historical clue formulations

• Autobahn speedometer meas. — 2026-08-17
• Unit on the autobahn, say: Abbr. — 2026-08-01
• Formula 1 fig. — 2026-05-08
• Autobahn abbr. — 2023-05-19
• Speed measure on European hwys. — 2022-03-21
• Metric speed meas. — 2021-11-20
• Overseas rate: Abbr. — 2021-10-30
• Overseas speed meas. — 2021-09-19
• Metric meas. of speed — 2020-07-20
• Speed limit letters, abroad — 2020-02-03
• European driver's concern: Abbr. — 2017-11-02
• Speed meas. in Europe — 2010-10-27
• Speedometer reading: Abbr. — 2005-09-11