2 beautiful jensen dp-alnico-5 12 inch concert speakers. Do not know the impedance or wattage. someone before me scrubbed that info off on both. Date codes are the same though. Does this
Radio Speaker of Canada Limited (RSC), vs Marsland (vs ink stamp 'Jensen') | The Canadian Guitar Forum
Celestion Date Codes - Bygone Tones
One of the better descriptions of Speaker and other Manufacturer Codes Speaker Manufacturer Codes:
Pair Vintage (1963?) Jensen C12R Speakers - Need Recone : The Steel Guitar Forum
JENSEN Portable Stereo Speaker for iPod/iPhone, MP3, Tablet, Smartphone SMPS-125 - The Home Depot
Help identifying vintage Jensen Speaker | The Gear Page