Sheaffer made sheaffer snorkel 52-63.
nibs not marked with letter-number after 58.
1. nothing
2. 14 k open nib
3. 14 k two toned open nib
4. palladium triumph
5. 14 k two toned triumph
6. palladium silver open nib

Admiral - #2 14 carat gold open nib, $10.00 in 1957 (E)
probably statesman $15.50 in 1956 (has F4 on nib palladium Triumph)
touchdown white dot, 14k two tone open fine nib.
Modern Sheaffer Prelude Silver fine
Modern Sheaffer calligraphy
Green lifetime
Parker Major "Geo S Parker" "PARKER VACUMATIC" "Made in USA" "..6." golden (or burgandy?) pearl
Burgandy Parker "51" Specal fine
Gray Parker "51" Special extra fine
Gray Parker "51" med
Red "Parkette Deluxe" 14K nib
2 rotring, fine and medium
rotring calligraphy
2 Pilot "Varsity"
Waterman Phileas black fine
2 Lamy Safari - blue fine and yellow medium
"chilton Pen" black rubber
green "wearever" from the 50's

http://www.fahrneyspens.com/Item--i-363101-BLK-IM--m-505_510.html

PELIKAN 200 FOUNTAIN PEN BLACK ITALIC MEDIUM NIB Item #: 363101 BLK IM Our Price: $99.00

http://hans.presto.tripod.com/cat007.html

http://www.jetpens.com/index.php/cPath/214_410 - Pilot Prera
japanese store

http://hans.presto.tripod.com/cat004.html Prelude Calligraphy Set SHEAFFER Calligrapher

Dating 51 - f the filler is stamped with "press six times" it's a 47-49 pen, after that it will be stamped "press 4 times".For undated barrels, if there is a small impression on the cap on the opposite side from the clip "made in the USA" it's post 1954. If the filler is stamped "use dry writing Superchrome ink" the pen is pre 1956 -- pens made later will be stamped "use Parker ink" or "use Quink ink" as Superchrome ink was discontiued in 1956.