Can 上 always be used like English ” ” (i.e.: same as above)? In English parts or fragments of sentences can simple be duplicated with ditto marks, here's an example from Wikipedia:

Black pens, box of twenty   .....      $2.10
Blue  ”     ”   ”  ”        .....      $2.35

Japanese has dōnojiten iteration mark: 々 - which works similarly to &quot;same as above&quot; or &quot;same as the last one&quot;: 人々, 山々, 個々.
The Wikipedia page talks about Chinese iteration marks saying:

In Chinese, 二 (usually appearing as 〻) or 々 is used in casual writing to represent a doubled character, but it is never used in formal writing or printed matter. In a tabulated table or list, vertical repetition can be represented by a ditto mark (〃).
History
Iteration marks have been occasionally used for more than two thousand years in China. The bronze script from the Zhou Dynasty, shown right, ends with “子二孫二寶用”, where the small 二 (“two”) is used as iteration marks in the phrase “子子孫孫寶用” (&quot;descendants to use and to treasure&quot;).


Here I have something that seems more like 上 than 二 though:

Wikisource has written it as:

熙熙然受天之祜

So presumably this mini-上 looking character is also an iteration mark but Wikipedia only talks about 二、〻、or 々.
So, is 上 also an iteration mark? and Can 上 always be used like English ” ” (i.e.: same as above)?
According to this kknews article (找薦004.疊字符/重字符這麼用，有沒有錯？), many variants were used for the iteration marks, including marks that were or looked like the following:


「S」
「々」
「匕」
「上」
「乙」
「=」


It goes on to state that what looks like「匕」is normally thought of as a result of rapid writing leading to graphical corruption, or degradation of the engraving medium (for steles). We know that「々」came from a variant of「同」, but the origin of「=」is conjecture without any hard evidence. It may be later surmised as「上」or「二」, but it is probably impossible to ever know.

BTW, if you search your copy of 躋春臺, it will have more examples of「匕」as the iteration mark.