Preserving Lost Engineering History
Reviews
3.6
(3)
Average item review
We calculate this number using a recency-weighted average of all ratings, with a rating's value decreasing by half each year to best reflect the current experience.
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Robin on Jun 22, 2026
1 out of 5 starsI wanted to be able to print the model 27 pages but it would require too much ink & hard to read. The 27w was nice & clear. Prob my fault for not looking closer to the preview pics. I order a nice reproduction copy on ebay
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About SignalArchive
Sales
21
On Etsy since 2026
Shop policies
Last updated on
Accepted payment methods
Accepts Etsy Gift Cards and Etsy Credits
Returns & exchanges
See item details for return and exchange eligibility.
More information
Last updated on
Jan 28, 2026
Frequently asked questions
How do I download my files?
After purchase, go to your Etsy account → Purchases & Reviews → Download Files
Are these physical items?
No. This is a digital download. You will receive PDF files only
Are the manuals searchable?
Some files are OCR-processed and searchable. Others are high-quality scans of original documents
Custom and personalized orders
Yes. These manuals are intended for collectors, restorers, technicians, and historical research