I've got Volume 3: Open and Globular Clusters below. While working on these, I've noticed some objects might have been updated since they were published in this volume. There is a section of the book identified as Class 7 Open Clusters from the RNGC. Many of these were classified as non-existent in the RNGC since they were not apparent on the POSS plates. Archinal and Hynes identified many of these in their book Star Clusters. They were classified as asterisms in DSOH Volume 3 and are included as a separate list below. For example, NGC 6997 is identified in this Class 7 list as an asterism but it is clearly an open cluster located in the North America Nebula (NGC 7000).
I have tried to make as few errors as possible, but some may have slipped through. If you find any, you are more than welcome to let me know and I will update the posted lists. I hope you find them useful.
The image above will take you to the AbeBooks website
Webb Society Deep-Sky Observer's Handbook: Open Clusters
Webb Society DSOH V3 Open Cluster SkyList
Webb Society DSOH V3 Open Clusters.stx.txt 1.55KB
Webb Society DSOH V3 Open Clusters.txt 3.39KB
Webb Society Deep-Sky Observer's Handbook: Globular Clusters
Webb Society DSOH V3 Globular Cluster SkyList
Webb Society DSOH V3 Globular Clusters.stx.txt 584bytes
Webb Society DSOH V3 Globular Clusters.txt 736bytes
Webb Society Deep-Sky Observer's Handbook: Asterisms
Webb Society DSOH V3 Asterisms SkyList
Webb Society DSOH V3 Asterisms.stx.txt 560bytes
Webb Society DSOH V3 Asterisms.txt 188bytes
I could not identify NGC 2356, NGC 6896, NGC 7234 and NGC 7295 from the Asterisms list in SkyTools 3 which is the program I used to generate these lists.