I have bought, probably 12 or 15 years ago, in London, a Grimshaw Revelation n° 45, flat top, dark brown, with the initials "EG" in a mother-of-pearl lozenge on the head, two-parts bridge and an ivory circle round the "rosace". Who said it's a deceiving instrument? For slide, it has a powerful and absolutely distinctive sound. With my mid-thirties Triolian, it's my favorite guitar. Would like to get rough estimate about the date.