19!
552 First Turkic Khaganate
1162 Kingdom of Navarre
1207 Rumi
1575 Leiden University
1697 Nine Years' War
1772 Mersenne prime
1851 The Crystal Palace
1860 Jane Addams
1865 United States Secret Service (surprised it was this early tbh)
1880 Folsom State Prison
1890 Egon Schiele
1906 George Sanders
1915 Anthony Quinn (went for between schiele and sanders)
1950 Israeli–Palestinian conflict
1954 Bhabha Atomic Research Centre
1955 Bundeswehr
1958 French Fifth Republic
1959 Pac-12 Conference
1973 Heart (band)
1982 Sun Microsystems (went considerably earlier which was stupid in retrospect)
1990 Pooja Hegde
1993 Czech Republic
2015 Apple Watch
definitely got lucky here, the leiden university one had the date on the crest, the '50s ones were a crapshoot and the order they came up was pretty kind.