Phil - posted on another thread that I can't decipher this but that it looks upside down, and then I read this! I haven't seen anything like it before. It is therefore exceedingly interesting!
Gwyn
P.S. I am I suppose self taught, though I've also learnt alot over the years from corresponding with others who know more than me.
The bracket is presumably the remnant of one of the hooks used to lift the sponson on and off. I think the two hooks have snapped off, or been blown off.
I've started a separate thread just for this little mystery. So it doesn't get lost.
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In wine there is wisdom, in beer there is freedom, in water there is bacteria.
799 was the first tank available to the German Army for thorough examination (the wreck must have been on the reverse slope of the gentle ridge which extends from Queant to Sans Souci Mill, allowing free movement around the wreck in daylight.) This likely accounts for the numerous photographs (none in colour that I have seen, however colour photography apparantly was available to a limited extent in WW1 - see below).
The work of Trevor Pidgeon (The Tanks at Flers) has been a great inspiration - he demonstrated the remarkable insights which can be obtained when period documents such as war diaries, maps and photographs, participants recollections and a study of the ground are combined. I'm particularly endebted to Rob (Munkeezulu) Martin, who has shared a large amount of archival material which he photographed at Kew.