|Exterior view in Carriage Works|
|Built By||FR Co.|
|Seating||Obs 8 x 1st / 12 x 1st|
Two carriages have carried this number.
- The first was built in 1964/5. As part of a carriage construction programme started in 2004, this was withdrawn in late 2005, and transferred to the Welsh Highland Railway Construction Ltd. for use as a mess carriage. It is since been renumbered, and details can be found here.
- The second, this vehicle, entered service in April 2007. See here for background and details of the construction.
Carriage 100 entered service with Carriage 124 in A-set with 11:40 departure on Friday 6 April 2007. It is also provided with three movable tables in the observation end.
Carriage 100 is the first and at present, the only FR observation carriage to be built without a guards' compartment. This has been moved into Carriage 124 as part of the 'service car' idea, whereby the on-train facilities are all housed in one carriage with no passenger accommodation. As a result 100 has the greatest seating capacity of any FR Obs, but must be in a carriage set with 124 in order to provide a guards' compartment. The carriage is provided with 8 moveable seats and 3 tables in the observation end, and 12 Pullman armchair in the top end.