Montblanc test marketed the VIP fountain pen in 1973. The company decided a slimmer pen was needed in the line-up. Following the successful test, Montblanc launch the Noblesse series of pens in 1974. Production continued through 1985. The second generation Noblesse was launched in 1986.

The Montblanc SL or Slimline was an economy version of the first generation Noblesse and launched in 1981. The pens featured a gold plated steel nib. Unlike the Noblesse line, the Slimline offers a series of abrasion resistant matte finishes called the CS-line (for Color Slim). The CS-line of pens were offered in four matte colors - black, blue, brown, burgundy. Matte white was added in 1985. Satin black, ruby red and midnight blue were added in 1988. The CS terminology was dropped in 1987/1988. The pens also featured the Montblanc snowcap on the pen clip. This was a visual difference with the Noblesse line. 

- Manufacturer/Model: Montblanc Noblesse Slimline
- Year of Manufacture: 1981-1990
- Color: Blue, Gold
- Material: Brass
- Nib: Montblanc Steel Nib, Fine
- Filling System: Cartridge/Converter (Not Incl.)
- Condition Rank: (B) Good Condition. Please see photos and Condition Rank Guide.
- Country of Manufacture: Germany 

Condition Rank Guide:
-NOS: Item is in New Old Stock condition (NOS). Shows little to no signs of use apart from some minor handling wear.
-A+: Item is in Excellent condition. Micro-scratches can be seen on the barrel, cap, and/or grip section. No noticeable scuffs, chips, or cracks.
-A: Item is in Very Good condition. Minor scratches and scuffs can be seen on the barrel, cap, and/or grip section. No Chips or cracks.
-B: Item is in Good condition. Moderate scratches and scuffs can be seen on the barrel, cap, and/or grip section. No Chips or cracks.
-C: Item is in Fair condition. Heavy scratches and scuffs can be seen on the barrel, cap, and/or grip section. Cracks or chips that potentially affect functionality may be present. See Photos.
-D: Item is in Unrestored condition. Item is good cosmetic condition, but not functional as-is. Requires repair or to be used as parts. No returns on items labeled with this rank.
-F: Item is in Poor condition. Item is broken beyond reasonable repair and should only be purchased for parts. No returns on items labeled with this rank.