Where can I get that and how on earth did you knew it is Arial
Hehe! Well, I'm a typography geek! :) When it comes to Arial vs Helvetica, the "R" ang the "G" is the most obvious difference. Unfortunately, Frutiger is not a free font so you'll have to but it unless someone is kind enough to lend it to you ;) I'm at the summerhouse at present and do not have access to my font collection.
Older B&O equipment (all 70's stuff and most of the 80's gear) used Helvetica, newer uses B&O's own variant of Frutiger.