The old one looks like an Ideal / Lyman.  I give mine a good cleaning inside and out with a wire brush on a drill motor once in a while.  That does wonders for them.  RCBS is a good one too, but a bit heavier to cast with.

What do you guy do to keep the dipper from getting oxidized between casting sessions.  I've just been spraying it down with wd-40 after it cools.  It helps a little, but not a lot.  I've been buying a new one every couple of years .   I like the RCBS ones too.

Chris.

I easily converted my Lyman dipper to left hand use.
Just drilled a 3/16 hole opposite the original location,
Threaded (a new, slightly longer 3/16 rod) and use a nut on each side of the dipper body to hold the new handle in its new location. 
2. RCBS dipper would be ok if one removed that "skid" from the bottom and also sharpen the back of the body somewhat
so one can scrape and skim with it
beltfed/arnie

Oh, also plugged the old handle holeon my now left handed Lyman dipper   with a round head 3/16 screw.

I have not tried the Lyman ladle but I really like the RCBS ladle over the Lee and Bill Ferguson ladles.  In constrast to beltfed I like the "skid" on the bottom, which I use to move the slag/crud out of the way & as a resting/pivot point when pouring the sprue.  I enlarged the spout hole with a 3/16 drill, which works better for me.

I may have to purchase the Lyman ladle to see how it compares to the RCBS.

Wayne

The Ideal dipper is fine for most casting jobs, but the RCBS is the go-to for big BPC bullets in .40 caliber and above.

Can't find it now, but the late, great Paul Matthews wrote an article long ago in which he calculated the perfect lead dipper ladle for casting .45-70 bullets.  It was of such proportions that it held the maximum amount of melted lead without tiring the operator.  He had a welder fabricate one up for him and announced it worked just as expected.  Several years later, RCBS came out with theirs, in cast iron, of course, and the resemblance to Matthews' design was nothing short of uncanny.

I never had any problem making 550 gr 45s with a Lyman dipper.  I'm too strong for my won good, broke my wrist turning a screw driver one time    but I still find that bigger RCBS dipper a bit heavy and awkward. All I use it for is moving more lead faster out of a pot if I empty it for some reason. 

Wonder why Paul Mathews wanted a bigger dipper?  Multi-cavity molds?