Help identifying metal in old data switch

Hi all! Trying to identify the metal inside this old data switch. It's not magnetic. Any help appreciated. Thanks in advance!

That looks like the inside of a rotary switch.
Most likely yellow brass contact plates.

Thanks. It's not a rotary switch but an older data switch like this http://www.datapro.net/images/2025-22C.jpg

Originally Posted by JJinLV

Thanks. It's not a rotary switch but an older data switch like this http://www.datapro.net/images/2025-22C.jpg

Please note the forest of solder points on the outside of the drum ...
That would most likely be a 2 position rotary switch with 12 contacts per deck. Without the part number I can not say for sure the exact configuration.