MT is the manufacturer for Apple who I forget who that is; their RAM Chip is the 4264; which is pretty generic of the 4164 Dynamic RAM Chip. You should be able to use 4164s in its place. Get as many as you can of them, preferable all 16. Take your time soldering them as they are sensitive to heat and static. And the traces are delicate in this area, so take your time and take it easy doing this. Many would replace the chips with sockets and then put the RAM Chips into the sockets.

If you like or are daring, you can upgrade at this point by using 41256 Dynamic RAM chips and it will boost your board to become a 512K Mac, its a direct chip drop in and no need to cut or add wires to the board. But that is on you, if you do, you need to replace all 16 RAM Chips.