Not exactly a shilling wulf, but as you say, a Scottish 12 shilling piece (which passed as equivalent to one shilling in England)!
In England the reverses of shillings read CHRISTO AVSPICE REGNO (I reign by Christ's authority) whereas QUAE DEVS CONIVNXIT NEMO SEPARET (what God has joined let none separate) refers to the Union of Scotland and England brought about by the crowning of Charles' father James VI of Scotland as King of England. Another give-away is the use of lions in two quarters of the shield.
It was indeed machine made. Struck by John Falconer, who was Nicholas Briot's son-in-law. His mark (a sideways 'F' appears above the crown).
I will need the picture of the obverse (Head) side to identify exactly which type your coin is. Probably Spink 5560. 1637-42.
Hope that helps for now. T
Edited by Tom Goodheart
06/09/2017 12:26 pm