Hi,

How can I tell what rev, A, B, C, or D, a T600 V1 is?

Thanks in advance.

As far as I know, you only can see it on the outside of the original  cardboard box with a decal like this:

A,B and C had some small changes mainly to the propeller locks. D version had a different Landing gear setup as well as again Different propellers (Quick Lock). V2 version has different motors & Esc's and again different Propellers & Lock's, The Pro version (labelled 601) on the sticker in the battery bay. Don't know if all V2 are labelled the same but my Pro Black Edition has a "E" Label on the cardboard box.

Search the Forum - this topic has been covered before many, many times.
Most importantly, the differences are negligible.

Thanks everyone.  Much appreciated.