In Ontario (and other provinces usually under some other name or # endorsement) the OPCF 43 endorsement removes the insurance company's right to deduct depreciation on your insured vehicle for a specified period of time after which if you suffer a total loss you will only get the "market" value of your vehicle. It's important on a brand new car when you buy to have this endorsement on your policy as it protects you during that period of time if you suffer a total loss.
There is still some caveats to that endorsement though as on most policies in a total loss the insurance company will still only pay you the lesser of 3 possible scenarios. More info about this endorsement here:
OPCF 43 - Learn about waiver of depreciation and replacement cost in car insurance. Make sure your new car has proper insurance if it's stolen or totaled and when it can be removed.
www.thinkinsure.ca
Like I said, if you are buying a brand new car you want this endorsement on your policy, it protects you for at least the first 2 years of ownership (or more like in my case).
I looked up the 19a endorsement and most of the sites I found mentioning this endorsement mentions collector car, speciality car, vintage car etc etc which is why I had said earlier that I thought only certain speciality car insurers offer that coverage (like Hagerty for ex.). They use to only cover vehicles over 25 years old or speciality cars (hot rods, race cars, rare sports cars etc etc) but I know they have branched out to include more modern cars if they are like not your regular run of the mill car (you probably aren't going to insure your Chevy Spark or Nissan Sentra with Hagerty for ex).
My dealings with Hagerty or any other "speciality" car insurance company looking for an agreed upon replacement value for my car(s) don't go well. I read about other people insuring their "fun summer car" (whatever it might be either old, original, modern, whatever) and I always hear "My car is insured for X # of dollars with them and it only costs me about.............................$500-700/year (arbitary #) to drive etc etc
When I inquire about my car (previous time my 09 Z06 and last year my ZR1) I tell them the replacement value I want and I was told all these restrictions when I drive it like:
Only to a car related event (cruise, car show, repairs)
No driving to work and back (I'm good with that one since I don't drive it to work but if I did the odd time...................so what???)
No driving the car and leaving it parked somewhere unattended (it was explained to me on this one like I can't go to the mall to do some shopping and leave the car parked, so basically everywhere you go eventually you're gonna have to park it somewhere but now I have to figure out where I can park it so it isn't left unattended) aahhmmm ok.
plus some other "strange" restrictions that I can't think of ATM and the premium that I would pay for the agreed coverage was stupid, basically I would pay you a crazy amount for a policy and my car just sits in the garage cause there's only a narrow window for when I'm "supposed" to be able to drive it.
My ZR1 quote insuring the car for $200k gives me a premium from Hagerty of $5000/year, from my current company (I have perfect rating) with a 5/year 43 endorsement is $1200/year and considering how little I drive the car now I still think that's a stupid amount to pay for it to sit in the garage most of the time but at least I don't have to plan my life around the event of when I drive the car like I would have to with Hagerty.
Anyways, this is long enough. Basically on a new car always get the 43 endorsement on your policy and should you go further on covering a car with an agreed value just be aware of the restrictions on when and how you drive it and decide accordingly.