From memory, (keep in mind that someone close to me pointed out that I only remember the stuff that was important to me) it had Columbus SL tubing. Whether it was SL or SP, I am not 100% confident, but it was Columbus that was tubing used for the Club Special. The dove decal was right below the seat cluster on the seat tube (the typical postion). Lugs were clean and simple. I have heard that they were Prugnat. There were no eyelets on the Campagnolo dropouts and fork ends. The dropouts were horizontal.

Paint and lug shorelines were perfect even where you don't always see.

Cinelli bottom bracket.