This is a great example of the W2241/M2 "Duchess of Hamilton" 4-6-2 Locomotive in LMS black. Running number 6229. This has the MK2 Chassis, with 3 Pole Motor and is extremely rare compared to its standard W2241 counter part. Ideal for the collection  and/or running passenger traffic on your "OO Gauge" layout. Basildon only produced 123, during the period 1987 - 1992.. Most examples today are "play - worn" this is not and has only seen minimal layout use in my opinion. As with all Period 4Wrenn Locomotives it has "metal rimmed" wheeled bogies. 

This comes in its original Period 4 box , and includes packing rings, tissue,  and Instruction Manual. The bottom of the white inner box is stamped "Packer No 3 71251" indicating 51st Week, 12 Month, 1987 as Basildon issue date.

Note: The M2 Is added as a stamp to the W2241 on the top box end flaps which is correct. : 

My assessment of the Locomotive/tender is "near mint ",box is "excellent to near mint" considering their age.