Slow-Baked Finnish Rye Jalkuunileipa (Finland)

Today's bake: Slow-Baked Finnish Rye Jalkuunileipa (Finland)
Source: The Rye Baker by Stanley Ginsberg
Notes: I scaled Stanley's recipe to make 2 small loaves instead of single larger one.
From - 1 @ TDW: 1.383kg Pan Size: 9x4x4 In / 22.86x10.16x10.16 CM
To - 2 @ TDW: 1.210kg Pan Size: 7.88x4x4 In / 20x10.16x10.16 CM
Substitutions: None