This is a milk jug. The brand is Royal Vale. The porcelain is bone china. The jug's size is diameter 7.3 cm and height 8.8 cm. I can identify the jug is Royal Vale as I have a sugar bowl which has the Royal Vale mark (see last 2 pictures). For my experience, the producing year is 1962. You can have a check the Royal Vale marks hisotry through this link https://thevintageteacup.us/pages/royal-vale-colclough
I also have a sugar bowl of this set (see the final picture) but this advertise is only for selling the milk jug not including the sugar bowl. If you want to buy the sugar bowl, you can search the eBay item number 145757045179. If you want to buy together, I can give you a slightly lower offer, you can search the eBay item number 145757082328.
The reference number is only for reminding me where is the bow not for this advertise. Referece Number: In Jaycee Display Cabinet.