I still have 2 Sachs-Dolmar Chain saws that my father bougt in 1980 they are running smoth.
I would gues that Sachs-Dolmar is the same as Dolmar.
I'm self prefering Jonsered but thats because a friend is seling them so I get discount prices, that no body else can match.
If I were to buy without friends price, I would defenetly stick to Dolmar.
They might be a bit heavy (weigt) compared with other brands of same preformance, but they defienetly last (live) for a long time.