Hey folks. I´m a welder and have a 1961 TV175 Horncasting (19.75.0086 FPB A-1961) come in for repair and it´s very difficult to identify the actual grade of material used for the casting and as such I can´t select a filler material for the repair. If it´s an unknown quantity then fair enough but any help would be great, I´d hate for the guy to have to go for a repro part when the original can be saved.