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Re: Puzzle No 2
The 2 raised rectangular sections on Pic 2 suggest they are for tightening the device down, but threaded for a 4" rod?
If it was 4" BSP thread i would think it was for a fire hydrant connection or similar, think you have got me on this one Retlaw - another clue perhapse - plesae, pretty please with cream and sugar
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Regards,
Barrie
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