Two more to add. 1503 which is an A3 Petzval and is used by its owner (from Rathmines Dublin, near where the Grubbs had their telescope factory) to do lovely wet plate portraits on a Calumet C-1. Also 5045 a 'Howard Grubb/Watson ' Aplanatic Doublet. This may have been part of a pair with 5046. I suspect that these later lenses may have been part of an early exercise in 'badge engineering', but I am not sure in which direction this went. Contemporary Grubb catalogues do not show any camera lenses at all. If anyone has Watson catalogues from the 1880s/1890s it would be useful to see if any of the 'Howard Grubb' lenses appear. The records of the Royal Dublin Society, where I am a member, show some lenses 'by Grubb' for astronomical photography produced around this time. This was a subject in which Howard had a great interest, but it is not clear if these lenses were all produced by Grubb. If I recall correctly, there is a record of at least one lens having been bought in from another manufacturer for astronomical photography. Paul Kay (pgk) told me that 1503 and 5045 brought the number of known extant Grubb lenses to 101 and, so, with 5277, that would make 102. We still have a long way to go.
The existence of 5045 came to my attention following the publication of the latest version of my article on Grubb and Parsons in the magazine of the Photographic Collectors Club of Great Britain (PCCGB). This latest version features lenses owned by pgk as well as some of my own lenses. I also included a photo of Yosemite taken by Carleton Watkins in the 1860s. He was known to have used a Grubb C lens for his landscapes.
William
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