| Name | Diamond Kiosk |
| Date | mid-1970s |
| Manufacturer | WE |
| Usage | US Phone Booth |
| Further notes |
| Overview & Functionality The KS-20255, also referred to as the Telephone Kiosk (Diamond Kiosk), is a stand-up, outdoor, doorless telephone booth featuring a distinctive diamond-shaped design. It was primarily intended for placement on city sidewalks, mall concourses, cultural centers, or other open public spaces. Its elevated lower section allowed debris and rain to pass beneath, enhancing cleanliness and safety. Though not designed for continuous rows, multiple kiosks could be arranged together in aesthetically pleasing layouts. Optional directory facilities could also be installed. Documentation & Timeline The KS-20255 is documented in Bell System Practices (BSP) under Section 508-430-100, Issue 1, dated December 1976, covering identification, installation, and maintenance guidelines. telephonecollectors.info The Coin Service Manual (Issue 3, December 1972) also includes KS-20255 in its table of contents under “Telephone Kiosk (Diamond Kiosk)”. These references suggest that the KS-20255 was standardized and in use from at least the mid-1970s. Features & Design Highlights Design: Doorless, diamond-shaped outdoor kiosk, ideal for open public areas. Functionality: Raised lower section to prevent debris accumulation and enhance ventilation. Customization: Optional directory units available to assist users. Installation Details: According to a co-located coin telephone installation manual, the backboard furnished with the kiosk must be used, and specific security hardware (P-40Y061 studs and ¼-20 × 5/8″ RHM screws) are required for installation. |
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