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# Rare 1st Edition Mervyn Wilson Ltd. Supa-Frost Series 9 (82.5mm) Filter Set (6 Pieces)
## Complete with Original Vintage Case & Authentic Workshop Technical Documentation Sheet
An incredible opportunity for vintage cinematography collectors and rental houses to acquire a complete, ultra-rare **1st Edition matching set of six (6) original Supa-Frost diffusion filters** handcrafted by master optician Mervyn Wilson.
Unlike the later mass-market commercial versions labeled under \"Wilson Film Inc.\" or \"Harrison & Harrison,\" this historical set dates back to the original independent British workshop era under **Mervyn Wilson Ltd.** out of 5 Harwood Close, Tewin, Herts.
### What Is Included:
* **6 Original Mervyn Wilson Ltd. Supa-Frost Filters:** 82.5mm / Series 9 standard unthreaded circular drop-in form factor.
* **Authentic Vintage Technical Documentation:** Features the original company letterhead, factory address, telephone contact data (043871 7686), comprehensive spectral transmission curve graph, and official maintenance guidelines.
* **Original Custom Hard Shell Presentation Case:** Two-tone vintage white and orange protective enclosure with clean, authentic embossed factory labels (\"SUPA-FROST\" and \"82.5mm Ø\").
### Technical Specifications (From Factory Paperwork):
* **Material Construction:** Custom optical cast acrylic sheet (Perspex), precision calibrated to 3.0mm thickness. Guaranteed plano-parallel and completely distortion-free.
* **Performance:** Mutes highlights, creates organic cinematic halation, and softens intense fog highlights while maintaining sharp color fidelity across the visible spectrum (400 - 700 nanometers). Transmission loss is exceptionally low, strictly engineered between 8% and 10%.
* **Engravings:** Clean, factory-etched designations on edges (including distinct retro \"STAR\" grid typography).
### Condition Profile:
* **Optics:** Vintage condition. Please review all high-resolution photos carefully to evaluate physical age and optical surface wear.
* **Case & Paperwork:** The original hard-shell case closes securely with expected shelf wear. The rare original documentation sheet shows slight age toning but remains completely crisp, legible, and un-torn.
**Shipping & Handling:**
Item will be packaged with extreme care using professional-grade archival packing materials. Worldwide shipping is available via \'s International Shipping program to accommodate global vintage lens collectors and production groups.
