[TR] TR4A parking brake question

[Dave1massey at cs.com]

In a message dated 5/6/2009 5:14:46 PM Central Daylight Time, 
jerryvv at roadrunner.com writes: 
> Dave, I don't think any TR4A ever had a push to release handle fitted 
> originally. What does a TR 250 have?
> 
Good question.  Perhaps some TR250 owners will respond.

Two theories considered are:
1) US DOT requirements mandated the Push-to-release or
2) this particular TR4A has a transplant from a TR6

Thanks for the response.

Dave