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The 1101 model consisted of 11 additional blocks. The Elektrik II Lehr-und Lernkartei (teaching and learning) document set was also included. When combined with the 1100, the 1102 model was formed.

I have never seen this model offered on eBay in the 7 years (as of this writing in 2019) I have been looking for Lectron System acquisitions.