[estcrh]

Originally Posted by Timo Nieminen

Some more antique sai (mostly Chinese, including sai/iron ruler hybrids) at http://museum.hikari.us/weapons/

They have a lot of items but the site and images etc have not been updated for years, some of the descriptions are suspect, they have this sai described as being an

Okinawan sai. Iron with cord and fabric wrapping with small wooden inserts.

It looks just like a four sided Chinese sai, this is how the vast majority of Chinese sai are made, what would make this one particular sai "Okinawan".