The Valsuani Stamp Guide: A Visual Timeline of Foundry Marks

For collectors, dealers, and authenticators, the foundry stamp is often the first piece of evidence examined when evaluating a Valsuani bronze. Yet despite its importance, no comprehensive public guide to Valsuani stamp variations has existed — until now. This article presents a systematic timeline of known Valsuani foundry marks, based on our examination of authenticated bronzes, archival photographs, and foundry records.

The stamps documented here represent the current state of our research. As with all aspects of Valsuani authentication, this guide should be used as a framework for analysis, not as a substitute for hands-on examination by qualified experts.

Early Period: Claude Valsuani (c. 1905–1923)

The earliest known Valsuani stamps are relatively simple: the name “VALSUANI” in capital letters, sometimes accompanied by “CIRE PERDUE” (lost wax). These stamps tend to be smaller and more crisply struck than later versions. The incuse lettering (stamped into the bronze) is characteristic of this period.

Variations during the Claude period include differences in letter spacing, font weight, and the inclusion or exclusion of “PARIS” as a location identifier. These variations likely reflect different stamp dies rather than different periods, but they can assist in dating when combined with other evidence.

Transition Period (c. 1923–1930)

Following Claude’s death in 1923, the foundry stamps underwent gradual changes under Marcel’s direction. The transition was not abrupt — early Marcel-period bronzes sometimes bear stamps that are virtually identical to late Claude-period marks. This overlap complicates dating but is consistent with the documented continuity of operations.

Marcel Period (c. 1930–1960s)

The mature Marcel period saw the introduction of larger, more standardized stamps. The lettering became bolder, and the inclusion of edition numbers became more consistent. Some bronzes from this period also bear a circular cachet in addition to the linear stamp — a practice not documented in the Claude period.

Late Period (c. 1960s–closure)

The foundry’s final operational decades produced stamps that are often less precisely struck, possibly reflecting wear on the stamp dies or changes in the stamping process. These late-period marks are the most commonly encountered in the market, as the foundry’s later output was numerically larger than its earlier production.

Red Flags

Certain stamp characteristics suggest inauthenticity. Stamps that are too perfectly uniform may indicate modern reproduction. Stamps that combine elements from different periods — for example, a Claude-era font with Marcel-era formatting — are suspicious. As noted in our analysis of common catalog errors, stamp evidence must always be evaluated in conjunction with other authentication criteria: patina, casting quality, provenance documentation, and stylistic analysis.

This guide will be updated as new evidence emerges. Authentication is an evolving discipline, and the Valsuani record — like all historical records — is subject to revision as new primary sources come to light. We encourage collectors and researchers to contact Art Revisionist with documentation of stamp variations not covered here.