That label is fairly well known and I illustrate it on P.58 of my book on the Arisakas in British service. It was used on the outers of Royal Laboratory produced 6.5x50SR ammunition for Russia, probably staring in early 1916.
The original Russian request in November 1915 was for 45 million rounds per month, but the Ministry of Munitions offered to supply 15 million in March 1916, 25 million in April and 45 million from May onwards. In the event, they only reached the 45 million mark twice, once in September 1916 with 46 million and again in March 1917 with 48 million. Total production for both Russia and the small UK requirement was 558,947,000 rounds. Full details of the ammunition production are in my book.
Remember that as well as the rifles supplied from Britain, Russia had obtained another 450,000 Arisakas from Japan in 1915 and expected another 130,000 during 1916.
The illustrated requisition 589 above refers to part of the 22 million sets of components ordered from Japan and loaded in the UK by Kings Norton Metal Co. These were Type 38 rounds with the spitzer bullet and were known in the UK as Mark I (despite the earlier round nosed Type 30 being the Mark II). They can be readily distinguished from Japanese loaded Type 38 rounds by the pin stab crimps securing the bullet. Example picture attached.
BTW, I am still looking for a 6.5mm Blanch tin plate dummy round headstamped "BLANCH No.15".
Regards
TonyE