Scotland in Pagan Times - Joseph Anderson, LL.D. (Keeper of the National Museum of the Antiquaries of Scotland)
The Rhind lectures in archeology for 1881:
https://www.google.co.uk/books/edition/Scotland_in_Pagan_Times/9lgJAAAAIAAJ?hl=en&gbpv=1&dq=norway+linen+smoother&pg=PR13&printsec=frontcover
Pages 36 and 37 give a long description of the lady from Caithness' linen smoother and the linen smoother found in a grave (both non handled)
He says
'Its purpose is demonstrated by the facts recorded by Nicholaysen and Lorange , who state that in Mandal Amt and in several remote districts on the west coast of Norway, the women still use them for giving a gloss to their white linen caps, and generally for getting up a gloss on linen by friction'.
I don't know who Nicholaysen and Lorange were so I'm not sure when their comments were made that he refers to but the implication is that it was fairly contemporary to his writing. Obviously this was about the ones without handles.
It could be he is referring to Nicholaysen's 'Norske Fornlevninger' Christiania 1866
and
'Samlungen af Norske Oldsager i Bergen's museum', ved A. Lorang. Bergen 1876
which are both mentioned here - also 1881 Joseph Anderson,'Scotland in Early Christian Times' second series.
https://www.google.co.uk/books/edition/Scotland_in_Early_Christian_Times/kLVNAQAAMAAJ?hl=en&gbpv=1&dq=Nicolaysen+and+Lorange+mandal+amt&printsec=frontcover
There is more information in the smaller text about his comments on the one from Caithness being remembered and then found in the lady's house, and he more or less says that this brought information to light in living memory but commented on how it demonstrates how quickly use of old implements could be forgotten.
He seems to say hers is 'modern' although it looks just like the viking find one. Perhaps he says modern because it was found in her house and used in living memory.
He goes on to say 'The placing of this specimen (of the modern type) in the museum has brought to light other three specimens of modern calendaring implements of glass. They are of larger size and furnished with handles, which are also of glass'.
Therefore this link to the lecture gives a little more detail than before especially since three with handles have appeared. Presumably the one from Gribdae Farm but perhaps the other two are the ones from the Museum of London?
The two extra linen smoothers with handles (in addition to the Gribdae farm handled smoother) were:
1 x given by J. Romilly Allen 1881, 5 1/2"diameter with handle 7 1/2" long
1 x from St Michael's Inn, Fifeshire - James Waddell 1881 , 5" diameter with handle 7 3/4" long
Source: page 326 items 133 and 134, from Catalogue of the National Museum of Antiquities of Scotland 1892
https://www.google.co.uk/books/edition/Catalogue_of_the_National_Museum_of_Anti/aZgodjaHjUwC?hl=en&gbpv=1&dq=linen+smoother+handle&pg=PA326&printsec=frontcoverJ. Romilly Allen was John Romilly Allen:
https://en.wikipedia.org/wiki/John_Romilly_Allen#:~:text=Having%20begun%20with%20the%20antiquities,in%20the%20University%20of%20Edinburgh.
I think the letter from Hamilton from Stewartry Museum a year or two earlier re the handled one from Gribdae Farm, brought these two additional items into the open.
So
I think not the ones in the Museum of London as I mused in my earlier post.
All three seem to have Scotland as source.
Mine also came from Scotland.
There is the smoother found at the Woodchester site with handle.
1 - dark green glass Bonhams dated c. 1650 - recovered from River Thames.
https://www.bonhams.com/auction/25846/lot/792/a-dark-green-glass-linen-smoother-british-circa-1650/A number in the Museum of London in parts (heads and handles), and 2 x whole.
Jamestowne excavation x 10.
1 in the Science Museum London (they have it listed as 19th century?)
2 from museum in Wales seen on the Glassmakers site
1 seen on Worthpoint - linked on this thread
1 x other on this thread