1880. Goldw. Smith, Cowper, vi. 92. It belongs to an unreproducible past.
1893. Nation (N. Y.), 18 May, 371/1. Desperate efforts to reproduce the unreproducible.
1899. R. Kipling, Stalky & Co., 225. An unreproducible sniff … rounded the retort. [Freq. in recent use.]
