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Can anyone tell me what the numbers for Conway Stewart pens refer to? I.e., the differences beweeen say a 475 and a 388.
There is little rhyme or reason within the CS numbering system. This is one of the joys of collecting vintage CS - you can never be sure that there is not a previously unknown model number out there still to find! However, there are a few 'general' rules (though I can only think of three at present). I say 'general' because there are still exceptions to these!
4 digit numbers (eg 1206) generally have at least one piece of precious metal trim, rather than plated brass.
500 - 599 reserved for Dinkies
640 - 649 reserved for Dinkie Majors
Numbers are only occasionally repeated (eg the 23 pre-war was a large Duro type pen, whereas post-war it was similar to a 58 for export to Australia and New Zealand).
The number suffixes (-L, -M, -S, -T, -A etc.) are even more confusing and not yet fully understood by collectors! In brief, in post-war pens, -L signifies a longer version than the standard (eg 85L), in pre-war pens, -M signifies mottled vulcanite, -T is plain tan (orange) vulcanite, -S refers to a 'toothpaste' stripe material found in Dinkies.
To confuse things further, pen / pencil sets were also given a range of numbers unrelated to the numbers of the pen included within! For instance, a number 10 set featured a Dinkie 540 with a Nippy pencil, a number 20 set featured a Dinkie 526 with a Duropoint 2 pencil. Again, there are a few exceptions, especially in exported sets!
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Also, a guide price would be handy!!
Prices of the common vintage CS pens are reasonably predictable but prices of the rarer items are up and down like a bride's nightie depending on who is in the market at the time, because the number of hard-core vintage CS enthusiasts worldwide is fairly small.
Personally, I would suggest not investing in a book, use the money to buy more pens instead! If you visit
Writetime CS page you will find a wide range of fully restored vintage CS pens offered at genuine market prices and I use this as my guide. I know of no other website that offers such a wide range of CS pens, accurately described and at sensible prices. Ebay prices will often be lower (but not always) and you can't always be sure of the condition. Obviously there are plenty of other sites selling vintage CS but they don't have such a good range or the prices posted are just not realistic.
Andy