MILAN, Sept 30 (Reuters) - Italian holding company Exor is offering to buy back a bond maturing in 2017, with an outstanding size of 690 million euros ($871 million), and to launch a new issue in euros with the aim of lengthening the average maturity of its debt.
Exor said in a statement on Tuesday the offer runs through Oct. 8 and preliminary details on the amount of notes validly tendered would be announced the following day. On Oct. 9 Exor also plans to publish details of the repurchase price. (1 US dollar = 0.7923 euro) (Reporting by Valentina Za; editing by Agnieszka Flak)