Which ver of nRF52840 do I need?

Official Hardware Nano Family Nano 33 BLE
1

How do I determine which version of the nRF53840 Product Specification manual
I need?
The VID: 0x2341
PID:0x805A
SN : 460C5CCBD56E7B3C
Thanks,
Mike

2

If you mean the processor data sheet, it would be the one the covers the processor model ID printed on the processor chip package.

3

Use the latest 1.11
There is revision history chapter, you can see just updates and additions, should be valid.