Villeroy & Boch made in Luxembourg

Hello,

I am trying to learn more about my coffee pot. It is yellow glazed, looks like a 60s style to me. It has a mark that reads 'Villeroy & Boch made in Luxembourg', preceded by a number '1' or possibly '2'.

I'm mostly interested in learning why there is a number before the mark.

I have found similar pieces online, however, the end of their spout is always different from my pot.

It is about 21 centimeters in height

and 24 centimeters in width.

Thanks for any help :)

Tableware manufacturers often made several differents shapes amd sizes
of tea/coffee pots in a range, so I would suggest a size or shape code.
Possibly even a capacity code: 1 or 2 litres.