Hi Peter,
Whether it is a Strathearn P14 depends on its size. P14 was the large version (2.7 inch to 3+ inch diameter ... as per Richard More's website for Strathearn weights.
If you were thinking that the canes defined the Reference number, that is not so. All of the carpet / closepack weights had a variety of canes that were mostly made at Strathearn (and they made a lot of canes) but also canes made in earlier years at Vasart Ltd and maybe even some from the Ysart Brothers (Vasart) period.