I purchased this item on HipStamp a while back. It was advertised as J14, the 5 pence version. But it was quite easy to see that it was actually J20, 5 shillings. Quite a bit of money back in 1907. (Perf 12 x 11)

I just checked, and it is also an inverted watermark version, which is odd (but normal for this issue.)