Albert Marth discovered NGC 6957 = m 423, along with NGC 6955, on 28 Jun 1863 and noted "vF, S, R." His position is fairly accurate.
400/500mm - 17.5" (8/1/87): very faint, very small, round, weak concentration. A mag 12 star is 1.1' SE. Pair with NGC 6955 7.4' W.
Notes by Steve Gottlieb