I've seen this design most often in bone but at least one person I was talking about swears up and down his is ivory. The board usually has mother of pearl inlay but idk since yours has metal pieces.
http://i.ebayimg.com/images/i/282038302486-0-1/s-l1000.jpg
https://assets.catawiki.nl/assets/2016/3/31/e/3/7/e378f3f8-f791-11e5-87b7-9d041bdeae0e.jpg
There's a wide range of designs with different sizes and levels of quality but always the same characters. It's generally sold as 20th century.
If you google for metal ones you can find it in metal (shown here without the board and still not quite parsing the elephants: ) But I hadn't seen metal ones till you asked about it and I looked.
http://thumbs.picclick.com/00/s/MTA2NVgxNjAw/z/yz0AAOSwNRdX5O4W/$/Egyptian-Solid-Metal-Chess-Set-_1.jpg
The elephants can be tricky because sometimes they're the rook even in India but my Turkish set has them as Bishops and I think that's closer to what we have here.
Thanks, couldn't quite parse the elephants.