Reference files are easy to buy and hard to choose when the category spans a builder's specifications file, a 1959 clerical indexing guide, a 1968 academic model for large online data files, and an EMT 140 reverb plate manual. The formats, audiences, and prices are completely different, so the practical question is which reference document matches the job you actually have. This comparison keeps the choice simple: focus on the format you need, the condition you can accept, and the kind of project the file was designed to support.
Quick take
- $8.50 - VTG 1959 The Efficiency Filing System: a hardcover guide for indexing articles, clippings, sermons, and books, aimed at ministers and religious workers.
- $16.96 - Vintage Practical Builder Data & Specifications File, 17th Edition: a used builder reference with some staining.
- $17.95 - EMT 140 Reverb Plate Technical and Operation Manual (PDF): a digital manual with schematics for the reverb plate system.
- $25.00 - A Model for File Structure Determination for Large Online Data Files (1968): a rare 48-page trade paperback on data-file structure theory.
Listed-price comparison
| Product | Listed price | Price bar | Format / condition |
|---|---|---|---|
| Vintage Practical Builder Data & Specifications File - 17th Edition | USD 16.96 | Used condition | |
| A Model for File Structure Determination for Large Online Data Files 1968 | USD 25.00 | Trade paperback, first edition | |
| VTG 1959 The Efficiency Filing System: Practical Guide for Indexing | USD 8.50 | Hardcover | |
| EMT 140 Reverb Plate Technical and Operation Manual (English) PDF File Option | USD 17.95 | PDF file option |
Decision matrix
| If your project is... | Start with... |
|---|---|
| Building or restoration research with older specifications | Vintage Practical Builder Data & Specifications File - 17th Edition |
| Historical study of large data-file structure | A Model for File Structure Determination for Large Online Data Files (1968) |
| Organizing sermons, clippings, articles, or books | VTG 1959 The Efficiency Filing System |
| Servicing an EMT 140 plate reverb | EMT 140 Reverb Plate Technical and Operation Manual (English) PDF File Option |
Product notes
Vintage Practical Builder Data & Specifications File - 17th Edition
The 17th edition of this builder data and specifications file gives you a period-specific reference for construction details, product data, and specification organization. At a mid-point price in this group, it is a used copy, and the condition is described as good with some staining. That matters if you plan to keep it as a shelf reference rather than a display piece. For a project that relies on older building specifications, the edition number alone makes it worth a close look because it represents a specific moment in builder documentation. The limitation is the physical condition: staining is already visible, so expect a working file with cosmetic flaws rather than a clean collector's copy.
A Model for File Structure Determination for Large Online Data Files (1968)
This rare 1968 work by Laurence David Martin presents a model for determining file structure in large online data files, a topic that still resonates with anyone studying data management history. It is the highest-priced option in this group, and the Good+ condition, first-edition marking, and advanced level designation set it apart as a specialized archival item. The 48-page length and Washington State University publication give it a clear academic identity. The practical limitation is its era: this is a 1968 theoretical model, not a modern implementation guide. You are buying historical context and conceptual framework, so do not expect step-by-step instructions for today's file systems.
VTG 1959 The Efficiency Filing System: Practical Guide for Indexing
This 1959 guide by L.R. Elliott is the lowest-priced option in this group and gives you a practical indexing system for articles, clippings, sermons, and books, written for ministers and other religious workers. The revised, enlarged edition is in Good condition and appears never to have been read, with no markups or tabs, which is a strong plus for a book of this age. If you work with sermon files, devotional clipping collections, or religious reference libraries, the targeted method can save you from adapting a general office-filing system. The limitation is its narrow audience: the examples and intended use center on religious and clerical work, so general office readers will need to translate the method to their own setting.
EMT 140 Reverb Plate Technical and Operation Manual (English) PDF File Option
This EMT 140 manual covers the plate reverb, its remote control, driver and output amplifiers, and it includes schematic diagrams and service notes, making it a focused technical reference rather than a general audio primer. It is the second-highest-priced option here, and it is listed as a new English-language manual for the EMT 140 model. The PDF file option is convenient for keeping a searchable copy on a computer or tablet. The limitation is format: a digital file is practical, but it is not a printed bound shop manual you can leave open on a workbench. For anyone servicing an EMT 140 or studying vintage plate reverb circuitry, this manual directly matches the task.
Final recommendation by use case
If you are servicing audio gear, the EMT 140 manual is the only one here that directly supports a piece of equipment. If you are looking for a low-priced hardcover filing guide, the 1959 Efficiency Filing System offers a practical indexing method. If your interest is the theory behind organizing large online data files, the 1968 model is the rare historical piece. And if you need older building specifications, the Practical Builder Data & Specifications File gives you a used but usable 17th-edition reference. The choice is less about which document is objectively better and more about which problem you are trying to solve.
