Vintage 2 boxed sets of pingo alphabet stamps and numerical rubber stamps boxed and original some age related wear mostly to the boxes although the labels etc are still in good condition for year readable etc these lovely wooden stamps could still be used but would make a great display piece 
Alphabet box 20 cm wide 8 cm depth 4 cm tall 
Number box 25 cm wide 4 cm tall 4 cm depth 
The invention of the Pingo alphabetical rubber stamp relies on the earlier development of vulcanised rubber by Charles Goodyear in 1844, with the rubber stamp itself being invented around 1866 by James Woodruff, who adapted rubberworking techniques used in dentistry to create letter molds for stamping. While there are conflicting claims about the specific inventor, Woodruff's work in custom rubber stamps was widely recognized and commercially successful, eventually leading to the diverse range of rubber stamps, including alphabetical ones, used today for various applications. 
Key Developments in Rubber Stamp History
1. Vulcanisation of Rubber:
The journey of the rubber stamp began with Charles Goodyear's discovery of vulcanisation in 1844, a process that transformed rubber from a sticky substance into a stable, durable material suitable for various applications, including dentures and later, stamps. 
2. Early Stamping Methods:
Before the advent of rubber, stamping was done with other materials, such as brass used to mark paper or create wax seals. 
3. Invention of the Rubber Stamp:
Around 1866, James Woodruff is often credited with creating the first recognizable rubber stamp by applying the rubber-molding techniques from dentistry to create letter molds for commercial use. 
4. Commercialization and Evolution:
Woodruff's innovative business model for custom rubber stamps marked the beginning of their wider use. The process of making rubber stamps became more efficient, leading to more accurate and faster production methods. 
5. Spread to Various Applications:
Rubber stamps, including alphabetical sets, became popular tools in various industries and for personal use, including the "Don't write it-Stamp it" concept for repetitive tasks, such as marking company logos or names. 
6. Modern Advancements:
The modern era has seen the development of even more convenient options, such as self-inking and pre-inked stamps, catering to a wide range of needs for organization, personalization, and artistic expression.