Sof1a the S1nger
Hello
Is it 1905 or 1912?
Hmm, you got me there, didn't notice that the combination appeared twice in the list. The current year list on this page is a mess, it should be reworked.
But I've found out that the first signature of the duo(Shipov) only appears on P#9c (1912 onwards).
For the exact variant I'll have to look in other places, the key will be the letters in the serial number.
…
Got it: Variant P#9.c.1.9: https://colnect.com/en/banknotes/banknote/45543-3_Rubles-1905-1912_Issue-Russia
Colnect lists every signature variant as a separate page. Most of the time it's an annoyance but it may be useful when it comes to these tricky Russian Imperial notes and their dozens of signatures due to their signature photo showing along with their banknote photo. Some notes here have this, but not all.