To the best of my knowledge, the original Webley 'Valvespout' oil can did not have a removable spout, plus the apparent soldering to the top and base of the can would suggest it is a reproduction, although not one of mine.
Below is a photograph of the top of an original on the left, and one of my replicas on the right. My replicas have a removable valvespout, with the knurled screw base covered by a friction fit collar.