The small holes resulting from saddle-stitch (staple binding) may or may not be present on the piece. As always, and as stated above, my pictures are your best source of information about this piece.
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300ml/1000ml Home Innovation Sealant Polyurethane Waterproof Coating for Home Bathroom Ceiling Adhesives and Sealants
Aliexpress UK
This is a 1958 ad for a Armstrong Cushiontone Ceiling Tile!
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Outsunny 3 x 1.5 m Retractable patio Awning Floor-to-ceiling shade, Black
Aliexpress UK
This is a 1986 ad for a Armstrong Ceiling Tiles! The caption for this ad is 'Why put up with a so-so ceiling, when it's so easy to put up an Armstrong ceiling?'.
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Circular Flower Arrangement Wedding Ceiling Hang Centerpiece Decoration Floral Green White Artificial Rose Wisteria Wreath 6.6ft
Aliexpress UK
This is a 1987 ad for a Armstrong Willow Square Ceiling Tile!
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2M Gorgeous Premium Fringe Tassel Banner Creative Party Foil Garlands Christmas Wedding Birthday Party Wall Ceiling Decoration
Aliexpress UK
ZENTIA FISSION ND (Was Armstrong Cortega) SUSPENDED CEILING TILES. Fissured ND face pattern. 70%RH - 34dB. Mineral Fibre.
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360 Rotating Swing Hangers Set 304 Stainless Steel Hanging Brackets Hammock Chair Hooks Ceiling Wall Mount Heavy Duty
Aliexpress UK
This 600 x 600mm ceiling tile suits a 24mm (Standard) grid. Hugely popular ceiling tile with a light sand textured finish. Square edge detail for a classic look. Durable with great all-around performance like humidity resistance and acoustics.
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1PC 1/3/5/6m Self-Adhesive Wall Trim Line Waterproof Corner Baseboard Sealing Strip Peel and Stick For Floor, Ceiling, Edges
Aliexpress UK
This is a 1954 ad for a Armstrong Cushiontone Ceiling Tile!
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2pcs Stainless Steel Swing Spring Heavy Duty Galvanized Hanger For Hammock Chair Porch Swings Patio Hanging Egg Chair Ceiling
Aliexpress UK
This is a 1989 ad for a Armstrong 914 Cimarron Panel Ceiling Tile! The caption for this ad is 'How do you top a great remodeling job' The ad is in great condition.
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Artificial Flower Balls Grass Ball Green Plant Fake Grass Landscaping Tree Shed Roof Home Garden Wedding Ceiling Hanging Decor
Aliexpress UK