IS this a Rare option ?? 300 MPH spedo Z-49

i have a Z49 Canada option ? & was wondering if any-1 knows what is included with this option ????
What i have found is :
1-the Speedometer goes to 300 MPH instead of 200...
& by pressing a button the needle jumps higher # to read (Kilo) by pressing again goes back to MPH ....
2- the Oil press guage says 0-600 kPa
3- the temp guage says 0-140 C
Is there anything else this Z-49 option may have ??
is this something rare or are there a lot of these options out there ?? -- sure would like to know what else this option includes
Thanks for any help !

The European Vettes come like this now also. It's pretty much just a standard to metric conversion. MPH to KPH and pounds per square inch to kilopascals.

Yeppers, you have the metric version...

Mac