There is no catalog number present on the release. M-5 is the official catalog number from the labels website. Side A plays at 33 ⅓ RPM, side B at 45 RPM. Comes with Info sheet: MAURIZIO "M5" Release Date: Week 5 Distributed by: EFA Tel.: 040-789170-45 in the UK: SRD Tel.: 081-902 3000 in Benelux: Play It Again Sam