Hello Winter,
the reason its so heavy is that’s the concrete encased version you’re looking at there. The concrete was reinforced with heavy mesh over the top, sides and the back, and the whole unit wrapped in a 14 gauge outer steel skin.
The 14 BSWG outer skin, is actually 1.99mm so generally approximated as 2mm, not very thick but obviously adds a bit to something of that size. It allowed the concrete to be poured in and also offered protection from damage afterwards.
The concrete encased units were around 558- 560 kg which, x 2.2 gives a weight in Lbs of 1232 pounds, so close to Lackasafe’s presumably estimated weight they mention. Didn’t look closely but theirs might be a palleted weight anyway.
As to finding one…
Most standard coffer units were of course intended for fixing inside a larger free standing safe, and so don’t get sold off very often.
The concrete encased versions are probably rarer, and similarly rarely seem to show up for sale. Markets and prices are very different around the world though. What Lackasafe might get for their stuff in the US is likely very different to what it would fetch here in the UK or Europe, even more so since our safe markets are dominated by the Euro gradings.
Keep looking everywhere, that’s all you can do really. I wanted a Castelle for my home safe and despite 25 years in the trade and eyes peeled up and down the country we never found one!
The Castelle is perhaps the hardest of all, as owners always seem to consider them keepers and rarely let them go.
I will also keep a lookout and let you know if one pops up for sale in the uk. Hope this helps and good luck!
