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Pentel PS523 Sliding Sharp

Pentel Sliding Sleeve Sharp PS523

Pentel, Japan

lead diameter(s)
mechanism
composition
variations
production date
origin
0.3 mm
pushbutton incremental advance clutch with sliding sleeve
plastic barrel, metal components
unknown
circa 1980 to (present)
Japan
 
see also Pentel catalog, 1980, p 25
Pentel Sharp
Pentel Sharp for Film
Pentel PS315 Sliding Sharp

Pentel Sliding Sleeve Sharp PS315

Pentel, Japan

lead diameter(s)
mechanism
composition
variations
production date
origin
0.5 mm
pushbutton incremental advance clutch with sliding sleeve
plastic barrel, metal components
barrel color: blue, gray, ?
circa 1980 to (present)
Japan
   
see also Art Brown catalog, 1978, p 100
Pentel catalog, 1980, p 25
Pentel Sharp
Pentel Sharp for Film