Derek,The picture in #58 does not appear to be a three legger. Looks suspiciously like a centre scavenge at top of picture.
That is exactly what I thougt too, so I mailed this person for an explanation, but no answer yet
Although, this picture from the same ship (Shell Tanker mv BELA) looks like there are 3 starting air valves.
And I believe - I am not sure -, but you must know, that on a 4 cylinder there were 2 sets of 2 starting air valves?
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