Hytone/Mead VINTAGE Science Filler Graph Paper, Ruled, 5 Sq/Cm, 16 Shts/Pk LOT

Description

VINTAGE Hytone Science Filler Graphic Metric Ruled 5 Squares Per Centimeter, 11 x 8.5, New Old Stock (NOS) - LOT of 11 Packs of Product #: 19-0820.  PLEASE NOTE: 8 packs are labeled 16 sheets/pack, and 3 packs are labeled 15 sheets/pack.
Lot of 11 packs (described above) from circa the 1960s-70s.  They were manufactured prior to the manufacturer moving this product under its Mead label, and the packs also predate UPCs, so they only show the item number.  They appear to be the same item that Mead later produced under the same item number.
All packs are in their original factory packaging and all except one are unopened.  The opened pack is torn at the factory seal on bottom end (it looks like it happened during storage).  It is a pack with the 16 pages/pack label, but it actually has 17 science filler pages.  Some of the packs have gaps in the plastic wrapping, and the exposed paper is yellowed in those parts (see photos).  One of the packs has a slight tear to the seal on one end (see photos).
Pages appear to be slightly off-white--I don't know if that's the original color or from age.  Pages appear to have green quadrille ruling on the front side (5 squares per cm) and blue horizontal ruling (I think it's college ruled) on the back side.  Pages are punched with 3 holes.  See photos for details--please note that although the packs are all the same and have the same product number, some packs have a plain blank page at the back of the pack, while others show the ruled back of the actual product pages.
The quadrille-ruled side has numbered centimeters along the horizontal and vertical axes.  The vertical axis is numbered from the bottom edge and moving up, 1-24.  The horizontal axis is numbered from the left edge and moving right, 1-18 (see photos).
Hytone was a product of Westab, Inc., a subsidiary of the Mead Corporation.
Photos are of the actual items that will ship.  Items are as-is.  No returns.