Albert Marth discovered NGC 6375 = m 337, along with NGC 6379, on 15 May 1864 and noted "F, vS, R." His position is less than 1' too far north. Brightest in a group, though he missed nearby UGC 10873.

400/500mm - 17.5" (8/1/89): fairly faint, moderately large, even concentration to a small bright core, substellar nucleus. Surrounded by several mag 14-15 stars including a mag 14 star 0.6' NE and a mag 15 star 0.9' E. Forms a pair with UGC 10873 2.8' SW. The companion appeared extremely faint, fairly small, thin edge-on N-S. NGC 6379 lies 18' ENE.

Notes by Steve Gottlieb