Do I have a V1 or a V2 GCH Hoist?

How do I know if my GCH Hoist is a GCH Model V1?

The serial number of the hoist ends in .10
The brake is the only difference between the V1 and V2 hoist, this looks like this:
AC (V1) GCH Brake unit

 

How do I know if my GCH Hoist is a GCH Model V2?

The serial number of the hoist ends in .20
The brake is the only difference between the V1 and V2 hoist, this looks like this:
DC (V2) GCH Brake unit