Always game for a little internet sleuthing, I did find this reference to a Firestone tandem with an alleged chainguard decal labeled "Jamaica." However, further searches give no indication that Firestone manufactured any lightweight road racing bikes, though it appears they did manufacture some lightweight "English Racers."
http://oldroads.com/arch/FSW2003_5_173_49_55_PM.html
FOR SALE: Firestone (Jamaica) Tandem Bike posted by: Roman Skala on 5/15/2003 at 2:51:39 PM
Hi Folks, I need some help evaluating the age and value of a bycicle I will be selling.
It is a Tandem with original paint, red and white, very little surface rust. Chain guards
have Firestone and Jamaica printed on them. Seats are spring loaded and in excellant shape.
Tires are large whitewalls, made in Japan. e-mail me if more information is needed. Any
help would be appreciated.
Thanks,
Roman Skala