“…Conservation practice ranges from preliminary investigation, through preventive measures, to remedial techniques, and to restoration; it may involve removing a vulnerable object from circulation and replacing it with a replica or surrogate. The conservator is faced with several dilemmas: if an object demonstrates several values, and has clearly gone through a number of changes to condition and meaning, should it be conserved in its current state, or should an attempt be made to regain something of an earlier state (Brooks et al 1996)? Should a musical instrument, or clock, be conserved so that it can demonstrate its original function of producing sound, or keeping time (this may involve repairing or replacing worn parts), or should it be cleaned of later accretions and stabilised as a static example in a typological sequence, or conserved complete with all the damage resulting from association with a notable event (a bugle used in a famous battle, a clock which went down with the RMS Titanic)?…”