Bloomberg) — Alphabet Inc. (GOOG) plans to sell a very rare 100-year bond as part of its mega debt issue, in the first sale of such long-dated debt by a technology firm since the late 1990s.

The 100-year bond will be denominated in sterling, along with four other tranches in the currency, according to a person familiar with the matter. The deal, which is Alphabet’s debut sterling sale, could be priced as early as tomorrow, the person added, asking not to be identified.