What qualifies as a C&R firearm?
As set out in the regulations (27 CFR 178.11), curios or relics include firearms which are of special interest to collectors by reason of some quality other than is associated with firearms intended for sporting use or as offensive or defensive weapons. To be recognized as curios or relics, firearms must fall within one of the following categories:
1.) Firearms which were manufactured at least 50 years prior to the current date, but not including replicas thereof;
2.) Firearms which are certified by the curator of a municipal, State, or Federal museum which exhibits firearms to be curios or relics of museum interest; and
3.) Any other firearms which derive a substantial part of their monetary value from the fact that they are novel, rare, bizarre, or because of their association with some historical figure, period, or event. Proof of qualification of a particular firearm under this category may be established by evidence of present value and evidence that like firearms are not available except as collector's items, or that the value of like firearms available in ordinary commercial channels is substantially less.
Refer to the last link for a list of many of the C&R firearms.
How do I get a type 03 (C&R) FFL?
Well first off you need to be 21 or older. Secondly you must be able to legally own a firearm, as in you aren't prohibited for whatever reason.
(ATF F 7CR (5310.16) - Curios & Relics Collectors Application)
It really is a bargain to get this FFL because it is only $30 for 3 years. Yep only $10 a year! Remember this is for collectors NOT dealers. You need to keep paperwork for all your C&R firearms and because you hold this license the BATF can inspect you. Don't be put off by that though. It isn't a surprise house raid, as far as I know they can only perform a compliance inspection once per year. Also they must contact you before hand and set it up to meet at your house or the nearest BATF office. They are only looking at your C&R firearms and paperwork. Remember this isn't for dealers but you can sell your firearms.
This should help answer any other questions as well as tell you if what guns are considered C&R. I'm not sure if the list is complete or up to date.
So apply, wait the 6 to 8 weeks, DON'T SIGN THE ORIGINAL COPY and get to collecting!