Nokia5110 LCD user's manual
For what it's worth:

in this link: https://www.bluetin.io/displays/nokia-5110-display-raspberry-pi-guide/ the same display as you is being used.

At the end, there is in Buying Featured Items - Adafruit a link added (named Nokia 5110/3310 monochrome LCD + extras), the link is:

https://www.adafruit.com/product/338 

This link shows a different pin-assigned board, but it seems functionally similar (at least you can check both pages).