It looks like data taken from Milne 1899 are not correct enough for 1919. Data by Byalokoz E.L. are slightly different. I think they are reliable, because in 1919 he was a president of the Russian Committee of Standard Time. The difference may result from the new standard that was accepted in Russia on Jul 3, 1916.
From: Paul Eggert <eggert@cs.ucla.edu> Date: Tue, 8 Jul 2014 19:23:04 -0700 Subject: [PATCH] Correct time in Russia before 1927 or so.
(Thanks to Vladimir Karpinsky for the Moscow corrections.) Other corrections are taken from Milne 1899. * asia (Asia/Tbilisi): Change LMT from 2:59:16 to 2:59:06. (Asia/Tashkent): Change LMT from 4:37:12 to 4:37:11. * europe (Europe/Helsinki): Change LMT from 1:39:52 to 1:39:49. (Europe/Riga): Change LMT from 1:36:24 to 1:36:28. (Europe/Moscow): Change LMT from 2:30:20 to 2:30:17. Change 1916/9 time from 2:30:48 to 2:31:19. (Asia/Yekaterinburg): Change LMT from 4:02:24 to 4:02:33. (Asia/Irkutsk): Change LMT from 6:57:20 to 6:57:15. (Asia/Vladivostok): Change LMT from 8:47:44 to 8:47:34. * zone.tab (Europe/Moscow): Use Kilometer 0 point. * NEWS: Document this.
Byalokoz E.L. gives the following data for 1919, before time zones were established in Russia: Riga 1:36:34 Latvia Tbilisi (Tiflis) 2:59:11 Georgia Samara 3:20:20 Perm 3:45:05 Yekaterinburg 3:45:05 @Perm that was the center of province, Yekaterinburg became regional center in 1923 Samarkand 4:27:53 Uzbekistan Omsk 4:53:30 Krasnoyarsk 6:11:26 Irkutsk 6:57:05 Yakutsk 8:38:58 Vladivostok 8:47:31 (From the book by Byalokoz E.L. New Counting of Time in Russia since July 1, 1919. This was an official info of the Russian Comittee of Standard Time.) Sincerely, Vladimir Karpinsky