This monogram is from the book, Chiffres & Monogrammes et Suite de Compositions Decoratives, published in Paris, France, in 1880, by heraldic artist Gustave Bussenot. 

Monogram: CL

Detailed background; Hidden bale on back; Cut and applied letters; Shiny finish with metal ink detailing

2.01 x 2.17 inches     48.20 grams