Vintage - Historic CBLT-5 1973-74 Mug

For anyone who collects Canadian television history we are offering this CBLT Five ceramic mug from 1973-1974.  It is in excellent condition with no chips or cracks - just 3 very small white marks on the red dot.  It measures 4 inches high and is marked on the bottom "Canada HLP 150".  I am assuming there were only 150 of these made but I haven't been able to find out if HLP is a potter or if it stands for something else.

As always, here's a brief history on the piece:

CBLT went on the air for the first time on September 8, 1952  broadcasting on channel 9. It is the oldest television station in the province of Ontario.  There was a mishap with the station's first broadcast by CBC's national network logo being upside-down.

 CBLT has used a variety of on-air brands since its inception. From 1957 to 1972, it was known as "Channel 6". Following its move to channel 5 in 1972, it became known as "CBLT Five", later shortened to "CBLT/5". In the late 1970s, it was known as "Toronto/5". During the 1980s, it was known mainly as CBLT-TV, although it used a "CBC 5" logo.

Please ask any questions and I will be happy to answer them.