Helios Airways currently operates a fleet of Boeing B737 aircraft.
Two B737-800 Next Generation 'Veni' and 'Zela', were delivered brand-new from Boeing in May 2001. These state-of-the-art aircraft are furnished with 189 leather seats and an inflight entertainment system.
A third B737-300 series aircraft 'Olympia' was delivered in April 2004, featuring 142 spacious leather seats.
A fourth aircraft has recently been delivered in order to cover our increased fleet requirements, featuring 140 seats.
I think the BBC article I linked to up-thread mentioned that they only had 4 aircraft. Am I correct in assuming from the above that only the 737-300 was an older model?
The 737-300 is an older model, not sure how old, and no longer produced. The -800s are some of the "Next Generation" 737s; they have lots of improvements, "glass cockpits" (where LCD screens or CRTs replace most of the analog instruments), much more sophisticated electronics, better engines, etc. They would be much newer than the -300.
}:-)4