I recently bought an amazing tenor sax and had it overhauled. It fits me perfectly, but I would love to know more about it. I know its a New Wonder Series II Transitional Horn and is tuned to A=440 due to the L, but i don't know the year and the engraving on the bell is different from any I've seen online. Its serial number is a M251xxx. On the bell in addition to the Conn Brand and engraving there is als on the name Alex Burns LTD London. Attached is a photo of the bell.