At the time I had a Gossen Variosix and measured this scene reflectively, with the diffuser dome taken off. A Spot metering would have been to complex due to the too many and too different (and extreme) 'zones'.
First slightly pointed upwards to somewhat avoiding the dominant reflexions on the water, then pointed a bit downwards to evaluate the intensity of the reflexions, and then guessing something like an average between the two as a basis for the bracketing: +2/3 — 0 — -2/3 stop, what I usually did with Provia as, to my personal opinion, a full stop was a bit too much of a good thing.
The best one was the '+2/3' as then the building came out a bit 'brighter', what was important to better show the aero condenser in the back, and the highlights (e.i. reflexions) were still 'acceptable' and could be handled by the fotogravure.
I let the photogravure (=chromiste) choose between the tree diapositives.
What you see here is a hardly edited home scan on an EPSON 750 of the '0' stop exposure as the good one (+2/3) was kept by the client.
This photo was taken at the end 1990's (and home processed in my Colenta AT60 machine).
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