[bojan]

I found something on one of images I took earlier this year with 135mm F5.6 and Canon 400D.
On first image, Beta is at lower left, down at the lower edge is Jewell Box.
The second image is the crop (200% size) with H 7 in the middle.

According to CdC, it is:

Open Cluster
Tr 20 Harvard 7
Constellation: Crux
Dimension: 18.0'x 18.0'
Magnitude: 10.10
Surface Brightness: 16.12
Description: L,vRi
About 200* mostly faint

J2000 RA: 12h39m42.00s DE:-60°35'60.0"
Date RA: 12h40m12.89s DE:-60°38'54.9"