Yes, Robert you are right in a way, at least, because the mentioned items have all been illustrated on a sales box that has the name of the series "Vanha Kartano" printed on it. The box also has a background picture of a large Country House.
I believe there is some fluctuation and do not know who really knows the actual definition what belonged to "Vanha Kartano" and/or/also called "Pirtti" series. (by the way "Pirtti" means rather a small log house or a "living room" of a smaller farm house, whilst "Kartano" means a large wealthy Country manor. "Vanha" is "Old" in Finnish)
There is also a series somewhere called "Matin matka" (Matti's journey) with the items "Iso√§iti" (grandmother), "Isois√§" (Grandfather), Pikku-Matti (Little Matti), "Maaherra" (Gorvernor) and "Ahkeraliisa" (BusyLizzy) (there's an other thread somewhere of these)
In the 100 year exhibition of Riihim√§en Lasi the glass museum showcased Piironki, Iso√§iti, Maaherra and Pikku-Matti with a label header "Vanha Kartano" which really confuses this all.
Somewhere even "Pala" is included in these series...
Anyhow, we know Helena Tynell designed these around the same period of time.