I believe there to be nine known heart-form pendants. Each heart pendants is unique, through all key-wound and of the same shape and size (the ones with images found are all hunter cases), and were produced in a period of time from the mid/late-1850s to the mid-1860s. It is interesting to see the same retailer (Hessenberg) for at least two of these pieces given their rarity.
If you own or know of others, please let me know.
Movement number: 15331
Case number: 15331
Manufacture date: 1858
Calibre: 9”, heart-shaped
Signature: dial, case and movement
Material: 18k gold, red garnets, pearl, enamel, blued steel hands
Dimensions: length 27mm, width 25mm
Sale date: November 26, 1864
Last public sale: Antiquorum, Important Modern & Vintage Timepieces, Geneva, 12 May 2019
Last public sale price: CHF 32,500
Last public comments: in original tortoise shell covered fitted box with winding key
Prior sale: Art of Patek Philippe, Geneva, 9 April 1989
Prior sale price: unknown
Prior sale comments: in this auction catalog a different sized caliber (16′) and also heart size (36 x x23 mm) are noted
Currently: this watch is currently owned by FutureGrail
Movement number: 16129
Manufacture date: 1859 per Extract
Calibre: 10” (movement signed)
Material: 18k gold, amethyst, diamond, enamel
Dimensions: diameter 27mm
Sale date: Unknown
Last public sale: Christies, Important Watches, Hong Kong, 29 May 2008
Last public sale price: HKD 247,500
Movement number: 16217
Case number: 16217
Manufacture date: 1859 per Extract
Calibre: 9’, heart-shaped
Cuvette: signed AMW, numbered (per Christie’s sale, below)
Signature: dial, case and movement
Material: 18k yellow gold, diamond rose, enamel
Dimensions: length 29mm, width 22mm
Sale date: August 5, 1868
Last public sale: JP Timepieces (and here)
Last public sale price: USD 20,900
Last public comments: in original box
Prior public sale: Christie’s, Important Watches, 15 November 2010
Prior public sale price: CHF 10,625
Movement number: 16219
Manufacture date: c.1854 per catalog, but movement would date to 1859
Material: 18k gold, red tourmaline, pearl, enamel
Retailer: Sackermann Hessenberg & Co, Frankfurt
Dimensions: length 27mm, width 25mm
Sale date: Unknown
Last public sale: Antiquorum, Important Collectors’ Wristwatches, Geneva, 16 October 2005
Last public sale price: CHF 26,450
Movement number: 25089
Manufacture date: 1864 per Extract
Calibre: 9”, heart-shaped
Cuvette: signed and numbered for the retailer and maker
Material: Gold, garnet, diamond, enamel
Retailer: Hessenberg & Co., Frankfurt
Dimensions: length 32mm, width 24mm
Sale date: December 9, 1864
Last public sale: Sotheby’s, Important Watches, Geneva, 11 May 2008
Last public sale price: CHF 43,000
Last public comments: one hand missing, service required
I am not sure why the following break with the numbers of other heart pendants:
Movement number: 6965
Manufacture date: unknown
Calibre: 9”, heart-shaped, 10 jewels, key winding
Material: 18k yellow gold, rose diamonds, blue enameled covers, blued steel hands, white enamel dial
Sale date: May 23, 1854
Source: Illustrated in Patek Philippe by Martin Huber & Alan Banbery, First edition, p. 108 & 109, pl. 17a-c. (also referenced in Christie’s and Sotheby’s)
Movement number: 7633
Manufacture date: 1853
Calibre: 9”, heart-shaped
Material: 18k gold, rose diamonds, blue enamel cover with rose-cut diamonds, white dial
Sale date: June 28, 1854
Last public sale: Antiquorum, Important Modern & Vintage Timepieces, May 7-8, 2022
Last public sale price: TBD
Last public comments: with Extract
Prior public sale: Ader: Bijoux & Montres, Paris, 25 November 2020
Prior public sale price: 12,800 Euro
I do not have movement number information for the below.
Movement number: unknown
Calibre: 9”, heart-shaped
Manufacture date: est 1854
Material: Gold, diamonds, green enamel cover
Movement number: unknown
Calibre: 9”, heart-shaped
Manufacture date: est 1854
Material: Gold
Case: Leaf design on cover