Big Bottles of G. Conterno Barolo Monfortino

In some vintages, Conterno has produced very large bottles (over 10 liters) of Monfortino. I have photos of 4 such bottles from the 1952 and 1955 vintages. For the first bottle, one photo clearly shows the contents to be 11.51 liters (11,51 liters in European notation). This bottle also says (in Italian) "contains 1/4 brenta - an antique peimontese measure".

Searching the Internet, I found this site which says that in old Milan, "1 brenta = 96 boccali = 75.6 liter". This would mean that 1/4 Brenta = 18.9 liters, not very close to 11.5 liters. The site also shows a measure from old Turin of "10 brente = 493.11 liter", so that 1/4 Brente = 12.3 liters. This seems closer.

For the other 3 bottles (shown below), the quantity cannot be clearly seen in the photos, but I have been told that the bottles are 13.5 and 12.5 liters.

Here are pictures of an 11.5 liter bottle of 1955 Monfortino:

Click on an image for a larger view.

This bottle measures between 57 and 58 cm high (which is between 22 and 23 inches high).

Rough translation of back label (provided by Greg dal Piaz):

THE WINE MONFORTINO

Produced with nebbiolo grapes selected and harvested in Monforte D'alba is a hot wine, with the color of antique brick with a transparent shadow, clear, with a rich bouquet, ample and long, you collect from the surface, violets, then tar, and in closing dried rose.
The wine Monfortino should be drunk at 18-20C.
This wine Monfortino Reserve 1955 was aged in botte #8, with a capacity of about 38 hectoliters and was reserved and bottled for Sir Giacomo Cora, the owner of the respectable firm A. Migliavacca of Milano.