I'm seconding Daryl's call for Holloway based on the H prefix.

I have a G&S Holloway catalog from the 1920s. The triple leaf fences are only found on the Best SLE they offered, from Page 1 of the catalog.

The description:
"Top Lever, Treble Concealed Draw Bolt, Carved Leaf Fence with Stock Jointed up to the Fences, best Intercepting Sear Locks, Finest Damascus or Solid Chopper Lump Nickel Steel Barrels, Anson Push-down Forend Fastener, Handsome Figured Walnut Stock, Gold Oval, richly engraved Scroll with Flowers, with finest finish. Fitted with Southgate Ejector. 88 gbp"


As I look at the top 3 Holloway SLE offerings, this is the only model with the correct fences and lock plate shape. The 2nd tier SLE has floral fences and is stocked to the fences. The 3rd tier SLE has floral fences, but is not stocked to the fences and has a different lock layout.
I can scan and email a PDF of the page(s). Abby at Cornell has copies of my catalog for sale.

Joe