Small medieval bronze cannon

[Guillaume]

Greetings,

I have been following the posts here for quite some time and enjoy the exquisite array of knowledge being shared. My hobby is researching and recreating medieval casting technology using period methods, from belt buckles to hand cannons. Currently I'm working on methods from Birringuccios "Pyrotechnia" regarding various furnaces and mold-making techniques for casting bronze. I've cast a few small hand gonnes and signal mortars using medieval methods. These are just for my own amusement and not for sale.

To that end, I'm looking for some small medieval European gonnes/cannons that are bronze and weigh between 50 and 100 lbs and the rough dimensions for these (I see a lot of images but most dont have measurements).

I'm familiar with the Loshult , Tannenburg, etc smaller hand gonnes but am looking for something slightly larger.

For instance, I like the bàton à feu as shown in this thread http://www.vikingsword.com/vb/showthread.php?t=10270 but would like to know if it is iron or bronze and some rough dimensions.

Thanks for any input!

Guillaume