Lot of 5 Slide Rules Pickett N4-ES N1010-ES 120-T N200-T (ALCOA) Berville Paris For Sale

Title: Vintage Mechanical Computing History: Multi-Era 5-Piece Slide Rule Collector’s LotOverviewUp for sale is a spectacular, curation-ready collection of five (5) vintage and antique mechanical slide rules.Detailed Inventory of the Lot1. Pickett Model N4-ES \"Dual Base Log Log Speed Rule\" (1949) including case

• Type: 10-Inch Professional Duplex Rule (Double-Sided Aluminum)
• Color Finish: \"Eye-Saver\" Yellow (Aged to a handsome cream/ivory patina)
• Key Stamping: Rare \"International Copyright 1949 / R.C. Pickett / Chicago, ILL\" corporate transition text.
• Features: Top-tier advanced engineering layout loaded with comprehensive Log Log base scales

2. Pickett Model N1010-ES \"Trig\" Duplex Rule (Copyright 1959) including case

• Type: 10-Inch Desktop Engineering Duplex Rule (Double-Sided Aluminum)
• Color Finish: Vivid \"Eye-Saver\" Yellow math coating designed to reduce desktop eye fatigue.
• Features: Complete trigonometric/logarithmic scale stack with clear dual-sided window cursor.

3. Pickett Model No. 120-T Student Simplex \"Trig Trainer\" including case

• Type: 10-Inch Single-Sided Student Training Rule (Molded White Plastic)
• Color Finish: Traditional White (\"T\") layout.
• Features: Streamlined 9-scale configuration (K, A [ B, S Cos, T Cot, CI, C ] D, L) engineered specifically to train young mid-century engineering students.

4.Vintage Pickett N200-T All-Metal Aluminum Pocket Slide Rule - ALCOA Promotional w/ Case

• Pickett & Eckel Model N200-T All-Metal Pocket Trig Slide Rule. This specific unit features rare, vintage promotional branding for ALCOA (Aluminum Company of America) across the stator face, complete with their classic marketing slogan: \"Change for the better with Alcoa Aluminum.\"Type: 6-Inch Compact Travel Duplex Rule (Anodized Aluminum)

• 5. Antique French Mannheim-System Pocket Slide Rule (c. 1919) including case

• Retailer/Maker: Berville – Paris
• Material: Authentic Ivorine-faced celluloid core.
• Key Historical Markings: Stamped with \"UNIS France\" (1910s National Inter-Syndical quality mark) and \"BTÉ S.G.D.G.\" (historical French patent mark).

Condition Report

• Instruments: All five rules are in good, complete vintage condition. Cursors are present, glass/plastic indicators are crack-free, and physical scales are sharp and completely legible.
• Please carefully inspect the provided high-resolution listing photos to assess physical details, markings, and cosmetic status before buying. sold as is