They originally had a claret livery, which was an exception at that time (most other SBB-CFF-FFS vehicles had the same green livery). They got the nickname "Golden Coast Express" ("Goldküstenexpress"), due to their service on the Golden Coast (which is the northern waterside of the lake of Zurich, known for its high land prices, thus attracting mainly wealthy levels of the population).
The original color scheme of these SBB-CFF-FFS vehicles was crimson, a rarity among other vehicles in that time period (most were green). They earned the nickname "Golden Coast Express" ("Goldküstenexpress") due to their service on the Golden Coast, which is known for its high land prices and attracts wealthy residents.