Vern,
I would certainly question if the one RP chamber marking on the PIA website I listed above is proper.
It is the 1 RP chamber marking that is shown side--by-side with another Portuguese chamber marking. The one I am questioning is the right-hand photo of the 2 chamber marking photos shown.
The rope is a double line with more width than other photos in books show and the middle of the rope seems to be shown with perpendicular 'ticking" lines across the thick rope. More like a rope ladder.
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