Ah ok thanks. Looks similar to the ones I found at a glance.
I tried to search about mig welding, and all I found was a number of threads poopooing it in lieu of tig, especially because of lack of temperature control on thin-walled bike frame tubes. Much confused now.
New. I did some research at the time, but can't really remember what I learnt...
This looks close. Mine uses gas for shielding, which is better, I think...
https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F123472227621