• Was about shifter cable, not the rear brake cable.
    And you're right, the same seat post clamp was used on later AA-Specials.

    Your rear brake cable guide is also of a later model.
    The 1st years (until 1987 or so), it was the pipe through the top tube, the outer casing went in for approx 1 - 2 cm at both sides. And a rubber "seal" on both sides.
    After that it was a thinner pipe with 2 chrome plated metal connectors as on your picture.
    Both versions sucked. Water, corrosion, friction...
    I prefer(red) 2 stoppers below t/t.

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