Are all Pixhawk revision 2.4 with green PCB prototype boards ?
The green 2.4.3 boards are not protypes. In fact, the new 2.4.5 board is black.
Text on my 3 1/2 months old pixhawk says only v2.4
what change is made to v2.4.3 and v2.4.5 ?
The new board just has a newer revision of the pcb from the distributor. You can check out the eagle files here: github.com/PX4/Hardware