I've seen these euro balance tubes before but this one is different. What is the "OXS" mean that's stamped on the side?

http://cgi.ebay.com/ebaymotors/Datsun-240Z-Euro-Balance-Tube-RARE-Brand-New-NOS_W0QQcmdZViewItemQQcategoryZ38634QQihZ017QQitemZ270003255999QQrdZ1QQsspagenameZWDVW

Thanks.

Jim

There are several diferent castings under this part number. What you are looking at seems to be latest variant. I bought one of these from Nissan two years ago for about $45. Here are some other versions of the same part number.