What is the earliest source containing the 'Stabat Mater' melody from the 1961 Liber Usualis?

I would like to find the earliest source containing the *Stabat Mater* melody on page 1634V from *The Liber Usualis* , Solesmes, 1961 edition: If the earliest source is not known, I would like a source before 1961. I checked the 1896 *Liber Usualis* (pg 1229) and the 1924 *Liber Usualis* (pg 1644), but both have a different melody.