The calendar has been rolled up. It may have some problem form acid located in the tube. Any indication as to when it was placed in the tube? What is the condition of the calendar re: color, stained, tears? There are a number of paper conservators in very State. I actually went directly to a conservation office of a museum and asked for a few names. I got a fabulous referral. The conservator was able to replace paper that had been eaten by silver fish, removed brown stains and voila the item looked like new
Swan22 less than a minute ago