While I am no authority but in my reading of the rules - they are different for an international flight versus a domestic flight.
From:
http://www.continental.com/web/en-US...liability.aspx
For international travel to which the Warsaw Convention applies (including domestic portions of international travel), Continental's liability is limited to approximately $9.07 per pound up to $640.00 per bag for checked baggage and $400.00 per customer for unchecked baggage.
For international travel to which the Montreal Convention applies (including domestic portions of international travel), Continental's liability is limited to 1,131 SDR (Special Drawing Rights) per customer for checked and unchecked baggage. Exchange rates are available online at imf.org.
Avoid packing high value, fragile or perishable items in your checked baggage. For domestic travel, Continental is not liable for loss, damage or delay in delivery of high value, fragile or perishable items. See Fragile and Perishable Items for detailed listings of excluded items. For international travel, Continental's liability is limited as per above.
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My reading is that for international travel there are no limits on the types of valuables that may be declared stollen unless the Warsaw or Montreal conventions have such limitations.