Notice, this 54 diagram has a Lyman W48 peep sight, and a rear dovetail slot filler, instead of the Winchester 22 buckhorn open rear sight. As well, it has a late-model NRA-style stock without the schabel forend, and, if you look closely, a serial number ending in "A" which indicates a later style with some changes from the original. It has an original style metal buttplate, which indicates that the stock is not the 'fuller' stock, from which the buttplate carried over to the Model 70.
A parts catalogue can be found here.
Differences between the Lyman 48W/WJS and Redfield TR-W
First, to say that there are differences really is stretching it. The only functional differences between the two is that the Lyman 48 has adjustable "zero plates." After sighting in the rifle, you can loosen the screws holding the hash mark plates in place, and align the hash marks with the witness mark on the elevation post and sight body. On the TR-W, the hash marks are directly on the sight body and windage arm and cannot be changed.
The TR-W is designed so that material doesn't need to be removed from the stock in order to install the sight. This is the same for the later 48WJS sights, but for the early 48WJS (I'll find the year later), wood needs to be removed.
Most importantly, the Redfield now sells for about 1/4 of the price of a Lyman. I think this is because there is a demand from M54/pre-64 M70 restorers who want to go back to the original Winchester configuration, or want to fill in the hole left when a previous owner removed a sight.
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