Aer Lingus' 737NG fleet consisted mostly of -400s and -500s, but the initial two deliveries were a pair of -300s delivered in late 1987, which stayed in their fleet for only 5-6 years. Interestingly, both of the -348s were later converted to freighters and are still active in the Philippines in 2022, over 34 years old.

Just over a month old when seen here on a mid-winter morning.