Otto Wilhelm move from Nicolai to Oscar BI:5 (1910-1910) Bild 1720 / sid 166 (AID: v271312.b1720.s166, NAD: SE/SSA/6025) 1910-11-05 together with Tekla Maria and they live at Skepparegatan 10. It is also noted that Tekla Maria was divorced from Otto Horace Jaeger 22/4 1890.
Otto and Klara are married 1915-06-26, Engelbrekt EII:2 (1913-1919) Bild 750 / sid 71 (AID: v227392.b750.s71, NAD: SE/SSA/6003).
Klara moves from Engelbrekt BIIa:7 (1915-1915) Bild 540 / sid 49 (AID: v227296.b540.s49, NAD: SE/SSA/6003) to Oscar BI:10 (1915-1915) Bild 1690 / sid 163 (AID: v271317.b1690.s163, NAD: SE/SSA/6025) in Sept 1915, also living at Skepparegatan 10.
1927-11-04 they move from Oscar BII:32 (1927-1927) Bild 670 / sid 126 (AID: v271394.b670.s126, NAD: SE/SSA/6025) to Johannes BIa:21 (1927-1927) Bild 870 / sid 82 (AID: v253364.b870.s82, NAD: SE/SSA/6022) where they live at Roslagsgatan 40. No children, at least not living at that time. They still live there 1950 and Otto dies 1957-12-13 and Klara dies 1959-06-01.
Is there a way to know for sure that they had no children?