Brand: A. Lange & Söhne
Model: Tourbograph Perpetual and 1815 Thin
Reference Number: 706.050FE (Tourbograph Perpetual), 239.050 (1815 Thin)

Diameter: 43mm (Tourbograph Perpetual), 38mm (1815 Thin)
Thickness: 16.6mm(Tourbograph Perpetual), 6.3mm (1815 Thin)
Case Material: 18k Honeygold
Dial Color: 18k Honeygold, black-rhodiumed, with relief-engraved numerals and scales (Tourbograph Perpetual); copper, white enameled (1815 Thin)
Indexes: Arabic numerals
Lume: No
Strap/Bracelet: Leather Strap