826.134-1037 is a Flaminia Convertible 2.8 3C, produced in the first year (1963).
total cars produced 180, in 1963 and 1964.
Information is from La Lancia, by Wim Oude Weerninck.
The year of production can be checked here:
http://viva-lancia.com/specials/lancia_production_dates/lancia_vin.phpIf the owners handbook is available, it contains the wiring diagram, to be compared with the Zagato one.
Otherwise CDs of Flaminia documentation exist, and there one could check if there is a difference with the wiring diagramm of a Flaminia Zagato. CDs are not expensive...
(Probably even a Zagato harness from the early Sport is not the same as for the latest Supersport....)