Hello Hornet785,
attached you will find 3 more stamps with an wider 1. teeth. This was due to manufacturing of the perforation and arises in the top row on a sheet.
Definitely these was from the beginning of the new stamps-editions in 1888 from Mi-Nr. 54 til Mi- Nr. 63.
How long this failure exist is not known. Sure the first edition from year 1888 (15.) and 1889 (16.) have this failure.
Peter Sem is writing in his book that with year 1890 and 17. edition the failure was solved.
But this can´t be because the printing of Mi.-Nr. 61 was started in Dezember 1889 for the 17. edition. And like the stamps will show us the failure still exist.
The date of cancelling from your stamp and from my stamp is year 1893. I can´t belive that from the first printing in 1889 til 1891 these both stamps were used in 1893.
May this failure exist till the 19. edition or longer.
greetings
staatswappen