Shot in the Dark by Chatto: Secret Service Picture Library #'s 1 and 5

Page Publications' Secret Service Picture Library 31 was published c.November 1971:

The cover illustration by Keith Chatto is adapted from the cover of MV Features' Secret Service Picture Library #5:

The MV Features edition was also distributed in Australia.

Shot in the Dark was recycled by Page Publications under a new Chatto cover in Secret Service Picture Library #5:

There are likely more Page Publications recyclings of this story to be unearthed.