Markings Question

[TheRyanExpress]

I am hoping some of you aficionados can help me with this.

I was recently gifted a Enfield 1914 BSA Co. Sht LE III but it has some unusual characteristics compared to other Sht LE that I have seen, hence my post.

1. the barrel seems longer than standard 31" total
2. it has markings of (crown) with S9 and E underneath
3. it has markings of (crown) with 2M and E underneath.

Also it has markings of crown / GR / W / P
It also has markings of a crown / 51 / E / '27

Can anyone point me in the right direction for more information on this, work-of-art.

I am a novice more-or-lesshttps://imgur.com/a/iwz1i4B

 

[TheRyanExpress]

Edited to add pics

 

[tiriaq]

A Short Lee Enfield barrel is 25 1/4". To get the 31" total, from which point to which point are you measuring?
Inspectors' marks don't tell you much.
'27 is the barrel date. The rifle was rebarreled.

 

[4n2t0]

This might help a little...

hXXps://www.greatwarforum.org/topic/242339-1915-lee-enfield-markings-newbie-question/ (replace XX with tt)