Hi Julie
Yes, it is a Crown pattern, but as usual it might be a copy from elsewhere. The mould was ordered in 1938, catalogue no. is either 358 or 378 (the numbers are overtyped, looks like 5 is heavier, so probably 5), and it was made from the drawing of a someone called Schaub.
I'd be interested to hear from Pamela and Glen as to whether the pattern appears elsewhere.
Cheers!