Indra Brike in Sudbinushka (1989)

The biopic of a Latvian folklorist Destiny contains some attractive if routine scenes of Indra Brike naked in her bathtub and on her wedding night.

Indra @ IMDb
Indra @ Wikipedia (Latvian)

Larisa Guzeeva in Anna Petrovna (1989)

The Soviet period drama Anna Petrovna features Larisa Guzeeva naked in a couple of tame but nicely staged scenes.

Larisa @ IMDb
Larisa @ Wikipedia

Olga Sumskaya in Solomennye kolokola (1987)

In the Ukrainian wartime drama Straw Bells refugee Olga Sumskaya is naked taking a bath in a tin tub in a country cottage in the depths of winter.

Olga @ IMDb
Olga @ Wikipedia

Jany Tempel in Der Staatsanwalt hat das Wort S26E04: Im Regen tanzen (1990)

The East German crime episode Dancing in the Rain features Jany Tempel naked in a love scene and getting out of a tiny tin bath in the kitchen.

Jany @ IMDb