Another popular evening brain teaser
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This is the only clue:
https://www.dropbox.com/s/4g0uewuk8xlk4 ... 0.jpg?dl=0
No other pantography or markings whatsoever.
Any ideas gents?

This is the only clue:
https://www.dropbox.com/s/4g0uewuk8xlk4 ... 0.jpg?dl=0
No other pantography or markings whatsoever.
Any ideas gents?
