Thank you for your help.The Churchill case does not come with the gun,I am waiting on one coming in.As you say,Churchill has been unresponsive.I had a look at proof mark which is crossed swords with lettering and the address is Orange St.Gunworks,Leicester Square,London.I had a look at proof mark history without accurately identifying it.It maybe Birmingham but unclear.I will continue delving as I would like to know more .
Kind Regards.