Nice little pair of prints , sapphire !
I'd say that they came from Haigh & Sons Ltd , South Hall , Middx(or Haigh & Sons , Glouchester) , in the era of late 1920's to late 1930's .
They look as if they may be stone lithos , with a retail value around $59 USD each .... possibly printed on linen or silk , IMO (without really 'seeing' them) .
If you do a search using the terms : "Normill print serial" , you'll turn up with many examples of work from that company .
Then there's the story of old McDougal , whose wife had given birth at home .... lacking a baby scale , McDougal used his salmon scale to weigh the newborn , who came in @ 34 pounds , 12 ounces .