La Chaux-de-Fonds commune (Neuchâtel canton, Switzerland)

Tierced per fess, Azure three Mullets of Five Argent in fess, Argent a Hive Or surrounded by seven Bees of the same, and chequy [of 7x3] Argent and Azure.

I saw in loco in La Chaux-de-Fonds and on stickers and souvenir flags I bought there, the bottom area is made up of 3x7 squares, thus occupying not 1/3rd of the flag's height (and area) but 3/7ths.  Moreover, on real flags the beehive has no "door" and looks quite stylized.

I received a colour picture from a lady working for La Chaux-de-Fonds municipal archives showing the official flag in which the 3 stripes are of equal height with 3x7 rectangles on the bottom stripe. I doubted how to draw this flag and I phoned La Chaux-de-Fonds to be as accurate as possible and they kindly sent me this photograph. Maybe there are several ways to draw the flag but I think that 3 equal stripes is the most elegant.