Book  (2018)  Page(s) 72.  
 
Après la guerre, les obtenteurs sélectionnèrent des variétés destinées uniquement à la fleur coupée. C’était par exemple les hybrides ‘Spek’s Yellow’ (1950), ‘Baccara’ (1964), ‘Super Star’ (1960) ou encore R. x floribunda ‘Garnette’ (1951) et R. x floribunda ‘Centenaire de Lourdes’ (1958), deux roses performantes pour leur tenue en vase et parentes de nombreuses autres variétés.

Book  (Aug 2002)  Page(s) 44.  
 
Golden Scepter
Rated 4.7

Book  (2001)  Page(s) 47.  
 
Golden Scepter Hybrid Tea, deep yellow, 1950. Rating: 4.7

Book  (Apr 1993)  Page(s) 217.  
 
Hybrid Tea, dark yellow, 1950, ('Spek's Yellow'); 'Golden Rapture' x Seedling; Verschuren-Pechtold; Spek, J&P. Bud pointed; flowers deep yellow, double (35 petals), high-centered, large (4 1/2 in.); fragrant; foliage leathery, glossy; vigorous, upright.

Website/Catalog  (1985)  Page(s) 46.  
 
Speks Yellow* (Hybrid Tea) A good well tried rose from the 50’s. Shapely, pointed buds opening to almost unfading golden-yellow. Good for cutting. Scented. 1950. (C) 3 x 2’.

Book  (1981)  Page(s) 162.  
 
The cultivars of [Jacques Verschuren]...'Spek's Yellow'....

Book  (1978)  Page(s) 98.  
 
Spek's Yellow  Medium. Yellow. Remontant. P2. H4
The European name for 'Golden Scepter'.  This rose came from Jac Verschuren-Pechtold of Haps, Holland. It was bought by Jan Spek, a nurseryman in Boskoop, indeed an exporter, which is a great catchet in Holland, for one cannot start an export nursery there without qualifications. The rose was introduced in Europe as 'Spek's Yellow' in 1948, and in the United States as 'Golden Scepter' in 1950.  The seed parent was 'Geheimrat Duisberg', otherwise known as 'Golden Rapture'.  Surely a tendency to have one's name changed cannot be hereditary?
This rose is brilliant yellow. It is an ugly, leggy grower, but a good survivor, for I see many plants doing well after twenty years. The leaves are sparse, and the flower buds too numerous. When it blooms nicely, the colour and form are pleasing.

Website/Catalog  (1970)  Page(s) 7.  
 
SPEK YELLOW. — Jaune éclatant très pur.

[no longer listed in 1971]

Book  (1966)  Page(s) 45.  
 
R. foetida has provided very important material for hybridisation, in that it indirectly brought its "yellow blood" to our most beautiful yellow roses, such as Peace, Spek's Yellow, President Herbert Hoover and others

Magazine  (Aug 1960)  Page(s) 3. trimester, p. 33.  
 
« Speks Yelow », (Jan spat 1947), un des plus beaux jaunes connus pour la fleur coupée.