Hi all.
I’m looking for clarity on Dapol 73s. I have plans to switch some body shells around but I think there is more than one type of construction used on Dapol 73s. I’ve read that these are:

- Older type with buffers attached to narrow black frame between body and chassis/bogies.

- Newer type with buffers attached to body.

Are there other variations?
Is is there a definitive list of which models are which variation, including JA and JBs?
Thanks in advance.