Thank you Drezac, those are great! I think the 12-pdr. Model 1840 and 1845 were very similar. Robinson's Battery has it that only 20 of the former were made and only a little over twice that amount of Model 1845s were. There's only one known Model 1840 survivor and I presume it's the one that's black and white picture has it sitting on a concrete base unfortunately.