Lincoln use that name on a range of their machines in which case it will be excellent.
If it is not a Lincoln Powertec & just Powertec it will probably be Chinese, as they couldn't give a toss about international copyright; leave it alone!
weldequip
Thanks weldequip - I did some more googling and couldn't find any other info. I am assuming that the branding is Chinese as it's not a Lincoln.
I'd decided to try and find a used unit that used Eurotorch rather than one of the integrated torches. I had the loan of an SIP machine a while ago and got some reasonable results but they weren't consistant.