I clocked it was a Viva HC straight away but the colour scheme fooled me into thinking it was a New Zealand version, the Viva Score 7. I was unaware of the Twin Cam model.
steve
I have been using Kadee couplings for years and this tool I have found to be invaluable.
https://www.kadee.com/237-coupler-trip-pin-pliers-for-hon3-ho-s-on3-o-scale-couplers
steve