The Tramvia Blau is a historic tramway from Barcelona, Spain. It was first introduced in 1901 and operated as part of the city’s public transport system. The tramway, running through the Sarri-Sant Gervasi district, connected Avinguda Tibidabo with the Funicular del Tibidabo, serving as a scenic route for visitors heading to Tibidabo Hill.

The reference to Seri 5-10 (Estrada/TMB) 1903 likely indicates a specific series of trams built around 1903, manufactured by Estrada and operated by TMB (Transports Metropolitans de Barcelona).

Scale

1:76 scale means that this is 76 times smaller than the full sized vehicle(s)

For a much more detailed explanation of scale and the history please followthis link.