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 "Isoäiti" (grandmother), "Isoisä" (Grandfather), Pikku-Matti (Little Matti), "Maaherra" (Gorvernor) and "Ahkeraliisa" (BusyLizzy) (there's an other thread somewhere of these)
In the 100 year exhibition of Riihimäen Lasi the glass museum showcased Piironki, Isoäiti, 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.