I feel the Charlton image of this weight is one of the better ones - just missing the colour information. The colour version of the same image is to be found on
Scotland's Glass. Whilst the shape of the rose is somewhat different, the colour is right (red).
The
1980 version is blue.
Especially as your weight has the 79 cane, I would assume the shape of the bud is a usual variation - and your wight actually is CT142.