This is beautiful! I think it is from Indonesia.
From the eBay listing:
I saw this at the flea market and it was drawing so much attention, I knew I should buy it before it got snapped up. The hand tooling on this thing is amazing. It is covered with fancy designs and also heavy equipment, including a bulldozer, road grader, dump truck, and crane. There is a large eagle on the front over the nameplate, which reads "C.L. Aldrich". On the back is a nameplate which reads "Atlas". The condition is excellent, though it could use a little cleaning. The liner is in good condition as well. This is a standard McDonald Mine safety Appliance Co. hardhat that has been laboriously hand tooled into a one of a kind work of art. On top it is inscribed Kota Gede Yogya with the initials NR. Kota Gede/Yogya is a region in Indonesia widely recognized for it's fine silver craftsmen. The initials NR are probbably those of the artist.
More pics here: Hand-tooled aluminum hard hat
