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Considerations on leather cases: the HP41c


Coconutfundas_-_6We have lately commissioned a couple of calculator cases for Voyager and Pioneer calculators. These cover many of the most used calculators, and we plan to extend it to other calculator ranges. Clearly now we need to address the HP41c range. Old vinyl cases are quite expensive nowadays - around 35€ for the whole length case.

When discussing with the leather technicians, I learned that the original HP41c vinyl case is a quite complicated case to build. As it has a relatively short zipper, it is quite complicated to assemble and requires a technique that was well known 50 years ago, but that fewer and fewer artisans master now: it is called "wood block". It is very similar to assemble luxuty leather shoes - but it explains also why later cases were shorter and had wider zipper mouths. It also has black ribbons in the corners - which makes it also more expensive to makeAnyway, the price for a complete leather HP41c long case was prohibitive. 

If we release the short zipper limitation then other techniques may be used and the price is substantially lower. Also the perimetral ribbon makes it more expensive - but let's see what the final cost is. 

The second question is whether it makes sense to produce the long case (for which we already have the foam sponge!) or go directly to the smaller, HP41c sized units. Probably we will end up with both. Color will be dark brown to start with. 

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