Yes, both of the bathrooms had bathtubs. The downstairs bathroom, on the main floor where my room was located, was a bathtub with a shower hose fitting. I.e. you sat on the bottom of the tub and used the shower hose. My friends in a fancy part of Stockholm still have this arrangement. There was a cold water sink in that bathroom and somehow the tub geiser did not supply the sink, so it was cold water only in the sink.
The upstairs bath, which most of the family used (four bedrooms on second floor, plus two bedrooms in converted attic above this floor), had a shower curtain arrangement around the tub so they could stand to shower. I doubt if kids their age were still taking baths, but when they were young and the house was new, probably they used it more for baths. Also, if I recall, there was a hot water tap in the sink which the downstairs bath lacked.
Never quite understood who ever used the downstairs bathtub, other than I (who lived downstairs), maybe when the kids were little and coming in from play time covered with dirt, they could have two bathtubs going at once. My room was small and may have been a converted office or "extra room", but it waS freshly painted and decorated in time for my arrival...my feeling was that it had never been used for a bedroom before my arrival.
Perhaps the design was so that an aged parent could live on the first floor in that room with a downstairs bath. That would have been very advanced design for the era, however, and her parents were killed in the war anyway (Allied bombing raid mistook their town for Germany...my host mother and her sister saw the raid from the next village, where they had been sent to care for an ailing grandmother). It was rather odd going there with three of my four grandparents alive and well, and none of their grandparents were alive.
I remember they were horrified when I told them:
1. corn is a delicacy in USA...for them it was pig feed (but they didn't at the time have US-style white sweet corn)
2. we often eat the potato SKIN and through the rest away. My host mother had never seen potatoes baked or roasted in an oven, EVER.
ps I am writing this from Nieuw Amsterdam, I flew there yesterday. No one seems to speak Dutch, however. Maybe if I went to the KLM check in counter at JFK Airport, there I would hear people speaking Dutch. But not in Nieuw Amsterdam (Manhattan). Also today is bright and sunny, so there is nothing to COMPLAIN about.