Workshop history https://asiamedals.info/threads/orders-made-by-halley-octave-lasne-paris.28433.
Privately-comissioned full set made for the Khedive of Egypt around late 1870s/early1880s /he was awarded Black Eagle order on December 30, 1868/. See also...
french-madeprussianorderofblackeagle
hoher orden vom schwarzen adler
hoher orden vom schwarzen adler halleyordermadebyhalley octave lasne paris
ordermadeby octave lasne paris
prussianorderofblackeagleprussianorderofblackeagle breast star
prussianorderofblackeaglemadebyhalley