7 favorite votes.  

White, near white or white blend Hybrid Tea.
Registration name: Mrs. Elisha Hicks

Bred by Elisha J. Hicks (United Kingdom, 1919).
Introduced in Australia by Hazlewood Bros. Pty. Ltd. in 1922 as 'Mrs. Elisha Hicks'.

Hybrid Tea.  

White, light pink shading.  Flesh, nearly white.  Strong fragrance.  Very large, double (17-25 petals), borne mostly solitary, high-centered bloom form.  Blooms in flushes throughout the season.  Large, long, pointed buds.  

Short, few or no prickles/thorns, upright.  Light green, dense, wrinkled (rugose) foliage.  

Height: 2' (60cm).  

USDA zone 6b through 9b (default).  

Type: 'Killarney'. The bush was said to be "stumpy" in growth.
'Silverscent' may, or may not, be the same as 'Mrs. Elisha Hicks. Research is ongoing and more information is sought.