One anecdote attributes the origin of the word to a meeting of the Preston Temperance Society in 1832 or 1833. This society was founded by Joseph Livesey, who was to become a leader of the temperance movement and the author of The Pledge: "We agree to abstain from all liquors of an intoxicating quality whether ale, porter, wine or ardent spirits, except as medicine." The story attributes the word to Dicky Turner, a member of the society, who had a stammer, and in a speech said that nothing would do but "tee-tee-total abstinence".
An alternative explanation is that teetotal is simply a reduplication of the 'T' in total (T-total). It is said that as early as 1827 in some Temperance Societies signing a 'T' after one's name signified one's pledge for total abstinence. In England in the 1830s, when the word first entered the lexicon, it was also used in other contexts as an emphasized form of total. In this context, the word is still used, predominantly in the southern United States.
If you own the plaque on the right below, or have one similar, I'd love a better quality image.
I will update the Dixon and Sheriff Hill pages with Tee Total plaques over the next few days. The jury is still out over C, C & Co. Because of similarity in the lustre decoration, I expect the second circular plaque is the C, C & Co version. If you have a marked example, please get in touch.