WTF is this chrome after market air box? 70's aftermarket?

[Fear My Twin]

http://cgi.ebay.com/ebaymotors/Honda-cafe-chopper-cb750-rare-vintage-airfilter_W0QQcmdZViewItemQQcategoryZ10066QQihZ001QQitemZ110154888688QQrdZ1QQsspagenameZWDVW

 

[xcaptainxbloodx]

looks like its basically one big air pod filter?

 

[DrJ]

it's from the 70s for building a 750 chopper. The sidecovers would be tossed if using it.